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Questions in this quiz (83)
1The value of a parameter may change as the sample value changes.
- ATrue
- BFalse
2A type of research inference involves using a statistic to estimate a parameter
- ATrue
- BFalse
3The value of a statistic is fixed
- ATrue
- BFalse
4In theory, the value of a continuous variable may take any value in some interval of numbers
- ATrue
- BFalse
5A random sample guarantees a representative sample
- ATrue
- BFalse
6For an experiment, a researcher manipulates conditions under which observations are made
- ATrue
- BFalse
7A random sample maximizes the probability of obtaining a representative sample
- ATrue
- BFalse
8The science of statistics can be used to prove anything a researcher would like to prove
- ATrue
- BFalse
9For an observational study, a researcher merely records values of the dependent variable. That is, the researcher does not manipulate conditions under which observations are made.
- ATrue
- BFalse
10The value of a statistic may change as the sample changes
- ATrue
- BFalse
11Boxplots are a graphical display of the 5-number summary
- ATrue
- BFalse
12If two events A and B are disjoint, then A ∩ B = {0}
- ATrue
- BFalse
13For the data set consisting of the four numbers -3, -2, -2, -5, a valid measure of spread for all the data will be <0
- ATrue
- BFalse
14The sample mean x̄, is always the balance point of the relative frequency histogram for the data
- ATrue
- BFalse
15The sample median x̃, is always the balance point of the relative frequency histogram of the data
- ATrue
- BFalse
16A positive correlation between two quantitative variables X and Y implies that as one increases the other tends to decrease
- ATrue
- BFalse
17A positive correlation between two quantitative variables X and Y implies that as one increases, the other tends to increase
- ATrue
- BFalse
18If two events are disjoint, then A U B = ϕ
- ATrue
- BFalse
19The probability of the sample space is less than 1 when the probability of all the events contained in the sample space is less than 1.
- ATrue
- BFalse
20The Standard Normal Curve is always symmetric around 0
- ATrue
- BFalse
21When two events A and B are independent, the
P (A and B) = P (A) X P (B)- ATrue
- BFalse
22When Z~ N (0, 1), then P (Z ≤ -1.34) = P (Z > 1.34)
- ATrue
- BFalse
23When X~ N ( μ, σ), then x̄~ N ( μ, σ/√n)
- ATrue
- BFalse
24When two events A and B are independent, then
P (A ∩ B) = P (A) + P (B)- ATrue
- BFalse
25The Rule of Thumb for independence when drawing without replacement from a population states when the sample size is ≤ 5% of the population size, we can assume the draws are independent
- ATrue
- BFalse
26H0: μ = 0 is only rejected when the p-value is > 0.05
- ATrue
- BFalse
27H1: μ ≠ 0 is only accepted when the p-value > 0.05.
- ATrue
- BFalse
28Suppose a 95% confidence interval for a population mean μ is given by (-17.32, 13.1). Then there is a 5% chance that μ will fall outside this interval.
- ATrue
- BFalse
29Suppose a 95% confidence interval for a population mean μ is given by (-17.32, 13.1). Then there is a 95% chance that μ will fall in this interval.
- ATrue
- BFalse
30If the sampled population is normal, then the sampling distribution of x̄ is normal when based on a random sample.
- ATrue
- BFalse
31The number of new projects started each month at a cancer research center for the last nine months are:
0, 6, 10, 10, 12, 12, 16, 30
The sample median x̃ for the data is given by:- A10
- B11
- C12
- D10.5
32The number of new projects started each month at a cancer research center for the last nine months are:
0, 6, 10, 10, 12, 12, 16, 30
The IQR for the above data is:- A8
- B7
- C6
- D14
33The number of new projects started each month at a cancer research center for the last nine months are:
0, 6, 10, 10, 12, 12, 16, 30
Based on our Rule of Thumb for outliers, the following holds:- AThere are no outliers
- BThe minimum value is an outlier
- CThe median value is an outlier
- DThe maximum value is an outlier
34Which of the following sets of numbers has the smallest possible variance?
- A7, 8, 9, 10
- B-12, -12, -12, -12
- C0, 0, 10, 10
- D20, 23, 23, 30
35The variance of 11 measurements of newborn height's (measured in inches) is computed to be 4 with a sample mean height of 20.
The units for the sample mean are:- Ainches
- Bsquare root inches
- Cinches squared
- Dno units, mean never has units
36The variance of 11 measurements of newborn height's (measured in inches) is computed to be 4 with a sample mean height of 20.
The standard deviation of these measurements is:- A16
- B2
- C4
- D8
37The units for the variance are
- Ainches
- Bsquare root inches
- Cinches squared
- Dno units, variance never has units
38Volunteers for a research study were divided into three groups. Group 1 listened to Western religious music, Group 2 listened to Western rock music, and Group 3 listened to Chinese religious music. The blood pressure of each volunteer was measured before and after listening to the music, and the change in blood pressure was recorded. The scatterplot is given below
What does the scatterplot suggest about the correlation between change in blood pressure and type of music?
- AIt is strongly negative
- BIt is strongly positive
- CIt is first strongly negative and then strongly positive
- DNone of the above
39Volunteers for a research study were divided into three groups. Group 1 listened to Western religious music, Group 2 listened to Western rock music, and Group 3 listened to Chinese religious music. The blood pressure of each volunteer was measured before and after listening to the music, and the change in blood pressure was recorded. The scatterplot is given below
What could we do to explore the relationship between type of music and change in blood pressure?- ASee if blood pressure decreases as type of music increases by examining a scatterplot
- BMake a histogram of the change in blood pressure for all of the volunteers
- CMake side-by-side boxplots of the change in blood pressure, with a separate boxplot for each group
- DDo all of the above
40Events A, B, and C represent all possible outcomes of an experiment. That is, the sample space is given by S= {A, B, C}.
Which of the following does not have to be true?- A0 ≤ P(A) ≤1
0 ≤ P(B) ≤ 1
0 ≤ P(C) ≤ 1 - BP ({A, B, C}) =1
- CP(A) + P(B) + P(C) =1
- DP(A) = P(B) = P(C) = 1/3
- A0 ≤ P(A) ≤1
41A fair coin is tossed two times in succession and the following events are defined:
A: {Observes at least one head}
B: {Observe exactly two heads}
C: {Observe exactly one head}
The sample space for this experiment is given by:- A{H, T}
- B{HH, HT, TH, TT}
- C{HH, TT}
- D{H-T}
42A fair coin is tossed two times in succession and the following events are defined:
A: {Observes at least one head}
B: {Observe exactly two heads}
C: {Observe exactly one head}
Using classical assignment of probability, the P(C) is:- A1/4
- B3/4
- C2/4
- D1
43Three experimental groups representing fitness levels for a random sample of U.S. men aged 35-45 were determined. The following chart represents the boxplots for the variable resting heart rate:
Which experimental group has the largest IQR?- AExperimental group 0
- BExperimental group 1
- CExperimental group 2
- DUnable to determine using boxplots
44Which of the following recorded variables is continuous?
- ATown of residence of a randomly selected college student
- BNumber of people, both adults and children, living in a randomly selected U.S. household
- CTotal household income (number of dollars per year), before taxes, in 2010 of a randomly selected U.S. household
- DAge, in years, of a randomly selected U.S. college student
45Which of the following recorded variables is categorical?
- ASize of town of residence, measured as "small" for sizes ≤ 70,000; or "large" for sizes > 70,000 for a randomly selected U.S. college student
- BNumber of residents per household working outside the home for a randomly selected U.S. household
- CThe number of residents for a randomly selected U.S household
- DAge, in years, of a randomly selected U.S. college student
46Which of these variables is categorical?
- AThe race time (in minutes) of a randomly selected participant in the 2013 New York City marathon
- BThe number of animals within a randomly selected geographical area
- CWhether randomly selected competitors in a running contest win or lose
- DThe total number of contests won by randomly selected competitors for the year 2012
47Does ginkgo biloba enhance memory? In a study to find out, 100 adult subjects who take ginkgo biloba once a day were randomly selected and 100 adults who do not take ginkgo biloba were randomly selected. Each group was given a memory test. The average score for the ginkgo biloba group was 82.78 and for the no-ginkgo group the average score was 73.46
The population(s) of interest are:- AAll adults
- BAll adults who take ginkgo biloba once a day; all adults who do not take ginkgo biloba
- CAll adults who take ginkgo biloba once a day
- Dnone of the above
48Does ginkgo biloba enhance memory? In a study to find out, 100 adult subjects who take ginkgo biloba once a day were randomly selected and 100 adults who do not take ginkgo biloba were randomly selected. Each group was given a memory test. The average score for the ginkgo biloba group was 82.78 and for the no-ginkgo group the average score was 73.46
The parameters of interest for this study are:- AWhether a person take ginkgo biloba or not
- Bthe memory test scores
- Cthe average test score for all adults who take ginkgo biloba and for all adults who do not take ginkgo biloba
- Dthe percentage of adults who take ginkgo biloba and the percentage of adults who do not take ginkgo biloba
49Does ginkgo biloba enhance memory? In a study to find out, 100 adult subjects who take ginkgo biloba once a day were randomly selected and 100 adults who do not take ginkgo biloba were randomly selected. Each group was given a memory test. The average score for the ginkgo biloba group was 82.78 and for the no-ginkgo group the average score was 73.46
The dependent variable for this study is given by:- Awhether a person take ginkgo biloba or not
- Bthe memory test scores
- Cthe average test scores for all adults who take ginkgo biloba and for all adults who do not take ginkgo biloba
- Dthe percentage of adults who take ginkgo biloba and the percentage of adults who do not take ginkgo biloba
50Does ginkgo biloba enhance memory? In a study to find out, 100 adult subjects who take ginkgo biloba once a day were randomly selected and 100 adults who do not take ginkgo biloba were randomly selected. Each group was given a memory test. The average score for the ginkgo biloba group was 82.78 and for the no-ginkgo group the average score was 73.46
The statistics calculated for this study are:- Athe sample averages 82.78 and 73.46
- Bthe average test scores for all adults who take ginkgo biloba and for all adults who don't take ginkgo biloba
- Cthe percentage of adults who take ginkgo biloba and the percentage of adults who do not take ginkgo biloba
- Dnone of the above
51Does ginkgo biloba enhance memory? In a study to find out, 100 adult subjects who take ginkgo biloba once a day were randomly selected and 100 adults who do not take ginkgo biloba were randomly selected. Each group was given a memory test. The average score for the ginkgo biloba group was 82.78 and for the no-ginkgo group the average score was 73.46
Is the claim "ginkgo biloba causes memory improvement" supported by this study?- AYes, because random samples were obtained and the average scores for the no-ginkgo group were lower
- BNo, because memory test scores can only be recorded as a categorical variable
- CYes, because there is evidence that the average memory test score for the population of ginkgo taking adults is higher than the average memory test score for the population of no-ginkgo taking adults
- DNo, because this is an observational study with possible confounding factors, such as genetics
52The Gallup survey organization obtained a random sample of 2,527 U.S. citizens. The proportion in the sample who favored a constitutional amendment that would define marriage as being between a man and a woman was 1289/2527 = 51%
The population of interest consists of:- AAll of the 2527 citizens sampled
- BAll U.S. college students
- CAll U.S. citizens who favor the amendment
- DAll U.S. citizens
53The Gallup survey organization obtained a random sample of 2,527 U.S. citizens. The proportion in the sample who favored a constitutional amendment that would define marriage as being between a man and a woman was 1289/2527 = 51%
The percentage of the 2527 citizens who favor the amendment is an example of:- Aparameter value
- Ba statistic
- Ccensus with respect to amendment
- Dqualitative, continuous variable
54The Gallup survey organization obtained a random sample of 2,527 U.S. citizens. The proportion in the sample who favored a constitutional amendment that would define marriage as being between a man and a woman was 1289/2527 = 51%
The dependent variable is:- Aa discrete quantitative variable
- Ba categorical variable
- Ca continuous quantitative variable
- Da discrete categorical variable
55A study was conducted to determine the effect of a new low-density lipoprotein (LDL) cholesterol lowering drug compared to the currently prescribed drug. 5000 U.S. adults aged 45-65 with "high" LDL cholesterol (> 130 milligrams per deciliter (mg/dL)) were randomly selected. 2500 of the adults were randomly assigned to the new drug group and 2500 of the adults were randomly assigned to the control (currently prescribed) drug group. At the end of the 1-year study period, the average LDL cholesterol level for the 2500 patients in the new drug group was 112 mg/dL and the average LDL cholesterol level for the control drug group was 125 mg/dL.
What are the population(s) of interest for this study?- AAll U.S. adults age 45-65
- BAll U.S. adults age 45-65 with high LDL cholesterol and all U.S. adults age 45-65 with normal LDL cholesterol
- CAll U.S adults age 45-65 with high LDL cholesterol who take the new drug and all U.S. adults age 45-65 with high LDL cholesterol who take the control drug
- DAll U.S. adults with high LDL cholesterol
56A study was conducted to determine the effect of a new low-density lipoprotein (LDL) cholesterol lowering drug compared to the currently prescribed drug. 5000 U.S. adults aged 45-65 with "high" LDL cholesterol (> 130 milligrams per deciliter (mg/dL)) were randomly selected. 2500 of the adults were randomly assigned to the new drug group and 2500 of the adults were randomly assigned to the control (currently prescribed) drug group. At the end of the 1-year study period, the average LDL cholesterol level for the 2500 patients in the new drug group was 112 mg/dL and the average LDL cholesterol level for the control drug group was 125 mg/dL.
What is the dependent variable?- ADrug, measured as taking new drug or control drug
- Bage, measured in years
- CLDL cholesterol > 130 mg/dL
- DLDL cholesterol after 1-year, measure in mg/dL
57A study was conducted to determine the effect of a new low-density lipoprotein (LDL) cholesterol lowering drug compared to the currently prescribed drug. 5000 U.S. adults aged 45-65 with "high" LDL cholesterol (> 130 milligrams per deciliter (mg/dL)) were randomly selected. 2500 of the adults were randomly assigned to the new drug group and 2500 of the adults were randomly assigned to the control (currently prescribed) drug group. At the end of the 1-year study period, the average LDL cholesterol level for the 2500 patients in the new drug group was 112 mg/dL and the average LDL cholesterol level for the control drug group was 125 mg/dL.
What type of variable is the dependent variable?- AA quantitative, discrete variabel
- BA quantitative, continuous variable
- CA categorical, discrete variable
- DA categorical, continuous variable
58
A study was conducted to determine the effect of a new low-density lipoprotein (LDL) cholesterol lowering drug compared to the currently prescribed drug. 5000 U.S. adults aged 45-65 with "high" LDL cholesterol (> 130 milligrams per deciliter (mg/dL)) were randomly selected. 2500 of the adults were randomly assigned to the new drug group and 2500 of the adults were randomly assigned to the control (currently prescribed) drug group. At the end of the 1-year study period, the average LDL cholesterol level for the 2500 patients in the new drug group was 112 mg/dL and the average LDL cholesterol level for the control drug group was 125 mg/dL.
What type of variable is the independent variable drug?- AA quantitative, discrete variable
- BA quantitative, continuous variable
- CA categorical, discrete variable
- DA categorical variable
59A study was conducted to determine the effect of a new low-density lipoprotein (LDL) cholesterol lowering drug compared to the currently prescribed drug. 5000 U.S. adults aged 45-65 with "high" LDL cholesterol (> 130 milligrams per deciliter (mg/dL)) were randomly selected. 2500 of the adults were randomly assigned to the new drug group and 2500 of the adults were randomly assigned to the control (currently prescribed) drug group. At the end of the 1-year study period, the average LDL cholesterol level for the 2500 patients in the new drug group was 112 mg/dL and the average LDL cholesterol level for the control drug group was 125 mg/dL.
The statistics calculated for this study are:- AThe average LDL cholesterol levels for both the high and normal populations
- BThe average LDL cholesterol levels given by 112 mg/dL and 125 mg/dL
- CThe average LDL cholesterol level for all U.S. adults
- DPercent with "high" cholesterol for both the 2500 patients prescribed the new drug and the 2500 patients prescribed the control drug
60A study was conducted to determine the effect of a new low-density lipoprotein (LDL) cholesterol lowering drug compared to the currently prescribed drug. 5000 U.S. adults aged 45-65 with "high" LDL cholesterol (> 130 milligrams per deciliter (mg/dL)) were randomly selected. 2500 of the adults were randomly assigned to the new drug group and 2500 of the adults were randomly assigned to the control (currently prescribed) drug group. At the end of the 1-year study period, the average LDL cholesterol level for the 2500 patients in the new drug group was 112 mg/dL and the average LDL cholesterol level for the control drug group was 125 mg/dL.
The parameters of interest in this study are:- AThe average LDL cholesterol levels for both the high and normal populations
- BThe average LDL cholesterol levels for both the new drug and the control drug populations after one year of taking the respective drug
- CThe average LDL cholesterol levels for all U.S. adults
- DPercent with "high" cholesterol in the population of adults age 45-65
61A study was conducted to determine the effect of a new low-density lipoprotein (LDL) cholesterol lowering drug compared to the currently prescribed drug. 5000 U.S. adults aged 45-65 with "high" LDL cholesterol (> 130 milligrams per deciliter (mg/dL)) were randomly selected. 2500 of the adults were randomly assigned to the new drug group and 2500 of the adults were randomly assigned to the control (currently prescribed) drug group. At the end of the 1-year study period, the average LDL cholesterol level for the 2500 patients in the new drug group was 112 mg/dL and the average LDL cholesterol level for the control drug group was 125 mg/dL.
The research inference of interest is given by:- AThe average LDL cholesterol is lower when the new drug is administered
- BThe new drug sample average LDL cholesterol < the control drug sample LDL cholesterol, thus estimate the new drug population average LDL cholesterol < the control drug population LDL cholesterol
- CThe sample average LDL cholesterol < 130, thus estimate the population LDL cholesterol < 130
- DThe new drug is effective for lowering LDL cholesterol
62A study was conducted to determine the effect of a new low-density lipoprotein (LDL) cholesterol lowering drug compared to the currently prescribed drug. 5000 U.S. adults aged 45-65 with "high" LDL cholesterol (> 130 milligrams per deciliter (mg/dL)) were randomly selected. 2500 of the adults were randomly assigned to the new drug group and 2500 of the adults were randomly assigned to the control (currently prescribed) drug group. At the end of the 1-year study period, the average LDL cholesterol level for the 2500 patients in the new drug group was 112 mg/dL and the average LDL cholesterol level for the control drug group was 125 mg/dL.
The design of this study is given by:- AAn experiment without random assignment
- BAn observational study without random assignment
- CAn experiment with random assignment to groups
- DAn observational study with random assignment to groups
63The legal profession conducted a study to determine the percentage of cardiologists who had been sued for malpractice in the last five years. The sample was randomly chosen from a national directory of doctors.
What is the dependent variable of interest in this study?- AThe doctor's area of expertise
- BThe number of doctors who are cardiologists
- CThe responses: have been sued/have not been sued for malpractice in the last five years
- DAll cardiologists in the directory
64Ignoring twins and other multiple births, assume babies born at a hospital are independent events with the probability that a baby is a boy and the probability that a baby is a girl both equal to 0.5
What is the probability that the next two babies are of the same sex?- A0.25
- B0.75
- C1.0
- D0.50
65Ignoring twins and other multiple births, assume babies born at a hospital are independent events with the probability that a baby is a boy and the probability that a baby is a girl both equal to 0.5
Define the events A = { the next two babies are boys}, and
B = { the next two babies are girls}. What do we know about events A and B?- AThey are symmetric
- BThey are complements
- CThey are independent
- DNone of the above
66Draws made with replacement are:
- Aindependent
- Bdependent
- Cnot independent
- Dnone of the above
67Draws made without replacement are:
- Aindependent
- Bdependent
- Cnot dependent
- Dnone of the above
68In the last mayoral election in a large city, 47% of the adults over the age of 65 voted Republican. A researcher wishes to determine if the proportion of adults over the age of 65 in the city who plan to voted Republican in the next mayoral election has changed. Let p represent the proportion of the population of all adults over the age of 65 in the city who plan to vote Republican in the next mayoral election. In terms of p, the researcher should test which of the following null and alternative hypotheses?
- AHo: p= 0.47 vs. H1: p< 00.47
- BHo: p= 0.47 vs. H1: p≠ 0.47
- CHo: p= 0.47 vs. H1: p> 0.47
- Dnone of the above
69The resting pulse rate for all runners in the New York City marathon for 2013 has a mean of μ = 70 and standard deviation of σ = 3. Suppose 49 runners are randomly selected from this population.
The distribution of x̄, the sample average resting pulse rate, is given by:- Ax̄ ~ N (70, 3) by CLT
- Bx̄ ~ N (3, 70) by CLT
- Cx̄ ~ N (70, 3/7) by result (1)
- Dx̄ ~ N (70, 3/7) by CLT
70The resting pulse rate for all runners in the New York City marathon for 2013 has a mean of μ = 70 and standard deviation of σ = 3. Suppose 49 runners are randomly selected from this population.
Find the probability that the sample average pulse rate of the 49 runners exceeds 70.86.- A0.9772
- B0.4772
- C0.3859
- D0.0228
71The power of a test of hypotheses is defined as:
- AP(conclude H1| H1 is true)
- BP(conclude H1 | Ho is true)
- CP(conclude Ho | H1 is true)
- DP(conclude Ho | Ho is true)
72You have measured the systolic blood pressure of a random sample of 80 employees of a large company located near you. You use the default confidence interval formula of a statistical software package to calculate a 95% confidence interval for the mean systolic blood pressure for all employees of this company ( denoted by μ). The calculated confidence interval is (122, 138)
What requirements are necessary for this confidence interval to be valid?- AThe sample mean equals the population mean
- BThe sample was randomly selected from an approximately normal population
- CThe population mean has an approximate normal distribution
- DA random sample and the sampling distribution of the sample mean given by x̄ ~ N (μ , σ/√80)
73You have measured the systolic blood pressure of a random sample of 80 employees of a large company located near you. You use the default confidence interval formula of a statistical software package to calculate a 95% confidence interval for the mean systolic blood pressure for all employees of this company ( denoted by μ). The calculated confidence interval is (122, 138)
Which of the following statements gives a valid interpretation of the phrase "95% confident μ is in the interval (122, 138)?- A95% of the population of employees have a systolic blood pressure between 122 and 138
- BThe method used to obtain the interval has a 95% chance of producing and interval that contains the population mean and systolic blood pressure
- CThe probability that the population mean blood pressure is between 122 and 138 is 0.95
- DBoth B and C
74Suppose the resting pulse rate for all runners in the 2015 New York City marathon a week after the event has a mean of μ = 70 and a standard deviation of σ = 3. Supposed 64 runners will be randomly selected from this population
The distribution of x̄, the sample average resting pulse rate, is given by:- Ax̄ ~ N (70, 3) by CLT
- Bx̄ ~ N (3, 70) by CLT
- Cx̄ ~ N (70, 3/8) because the sampled population is normal
- Dx̄ ~ N (70, 3/8) by CLT
75Suppose the resting pulse rate for all runners in the 2015 New York City marathon a week after the event has a mean of μ = 70 and a standard deviation of σ = 3. Supposed 64 runners will be randomly selected from this population
Find the probability that the sample average resting pulse rate of the 64 runners is less than 70.9375- A0.9938
- B0.4522
- C0.5478
- D0.0062
76Suppose that A and B are two independent events. The probability that event A occurs in 0.4 (i.e. P(A) = 0.4), and that B occurs is P(B) = 0.2. What is the probability that both A and B occur?
- A0.08
- B0.60
- C0.52
- D0.40
77A random sample of size n = 36 is to be drawn from a population with μ = 500 and σ = 200. What is the probability that the sample mean exceeds 400?
- A0.6915
- BApproximately 0
- C0.3085
- D0.9987
78The scores of individual students interested in majoring in a Health Science program on the American College Testing (ACT) Program Composite College Entrance Examination are normally distributed with a mean of 18.6 and standard deviation of 6.0.
Find the proportion of scores that are greater than 33.6- A0.0062
- B0.9938
- C0.0228
- D0.8413
79The scores of individual students interested in majoring in a Health Science program on the American College Testing (ACT) Program Composite College Entrance Examination are normally distributed with a mean of 18.6 and standard deviation of 6.0.
Find the proportion of scores falling in the interval [12.42, 31.2]- A0.8234
- B0.1515
- C-0.8234
- D0.8306
80The scores of individual students interested in majoring in a Health Science program on the American College Testing (ACT) Program Composite College Entrance Examination are normally distributed with a mean of 18.6 and standard deviation of 6.0.
Find the proportion of scores that are less than 4.02- A0.0075
- B0.9925
- C0.9918
- D0.0082
81The attached table provides data from "A Case-Control Study of the Effectiveness of Bicycle Safety Helmets in Preventing Facial Injury"
For the group that did not wear helmets, find the risk for facial injury
- A0.78
- B0.44
- C0.27
- D0.16
82The attached table provides data from "A Case-Control Study of the Effectiveness of Bicycle Safety Helmets in Preventing Facial Injury"
For those who did not wear helmets, find the odds of facial injuries to non-facial injuries- A0.78
- B0.44
- C0.43
- D0.16
83The attached table provides data from "A Case-Control Study of the Effectiveness of Bicycle Safety Helmets in Preventing Facial Injury"
Find the odds ratio for facial injuries in the group that did not wear helmets to the group that did wear helmets- A0.78
- B1.36
- C0.16
- D1.81
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- STAT 121- Fall 2021
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- Madison Skeel
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- English
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