Quiz
Statistic Final Practice
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Perguntas do quiz (50)
1A factorial ANOVA includes ______ independent variable(s).
- Aonly two
- Bmore than one
- Conly three or more
- Donly one
2A regression line is also called the ______.
- Aline of best fit
- Bline of the estimate
- Cline graph
- Dscatter plot line
3A simple analysis of variance includes how many factor(s) or treatment variables in the analysis?
- Aone or more
- Bonly one
- Cthree or more
- Donly two
4A z score that falls below the mean is _
- Aequal to the mode
- Bpositive
- Cnegative
- Din the upper half of the distribution
5After the first set of data having to do with populations was collected during the 17th century, scientists needed to develop ______.
- Aspecific tools to answer general questions
- Bspecific tools to answer specific questions
- Cgeneral tools to answer general questions
- Dgeneral tools to answer specific questions
6After the z value is calculated, locate the ______ from a table of z scores.
- Aobtained value
- Bcritical value
- Ctest value
- Dcalculated value
7All but which of the following are measures of central tendency?
- Astandard deviation
- Bmode
- Cmean
- Dmedian
8Correlation coefficients are used to describe ______.
- Athis depends on the correlation coefficient used
- Ba group
- Cindividuals as well as the group
- Dindividuals
9Correlation coefficients can test ______ variable(s) at a time.
- Atwo or more
- Bonly two
- Cone or more
- Donly one
10How many subjects were examined based on the following: t(29) = 2.001, p < 0.05?
- A31
- B32
- C30
- D29
11If the absolute value of the correlation is very close to 0, the error in prediction will be ______.
- Alow
- Bhigh
- C0
- Dvery low
12If the correlation between two variables is 0.496, how much of the variance has not been accounted for?
- A24.6%
- B75.4%
- C50.4%
- D49.6%
13If the correlation between variables is 0.70 the percentage of the shared variance is ______.
- A30%
- B51%
- C49%
- D70%
14If the obtained value is greater than the critical value, what decision should be made?
- Ato reject the null hypothesis
- Bto increase the sample size
- Cto set a higher p value
- Dto accept the null hypothesis
15If you have 30 respondents identifying their political preference (i.e., Democrat, Republican, or independent), what would the expected frequency be for each category?
- A10
- B30
- C20
- D40
16If you were interested in tracking your GPA during the time you are in graduate school, which of the following might you use?
- Apie chart
- Bbar chart
- Cline graph
- Dhistogram
17If you were to hypothesize that there is a relationship between reaction time and problem-solving ability, you would have a ______.
- Anondirectional research hypothesis
- Bdirectional research hypothesis
- Cnull hypothesis
- Dhypothesis type that cannot be determined
18In a t-test for dependent means, the research hypothesis could look like this:
- AH1: x̅1 > x̅2
- BH0: μ1 = μ2
- CH0: x̅z > x̅2
- DH1: μ1 = μ2
19In order to compute the test statistic, or t value, you must first approximate the sample size by calculating the ______.
- Amean score
- Bstandard deviation
- Cpooled variance
- Ddegrees of freedom
20In the formula that computes a t value, what does X̄1 represent?
- Athe standard deviation for Group 1
- Bthe variance for Group 1
- Cthe mean for Group 1
- Dthe number of participants on Group 1
21Independent variables are thought of as ______.
- Amixed design
- Brepeated measures
- Cone-way Anova
- Dfactors
22Once numbers became part of the human language, the next step was to attach ______.
- Anumbers to letters
- Bnumbers to places
- Cnumbers to outcomes
- Dnumbers to time
23Should a chart alone convey what we often want to say?
- Ano
- Bnot sure
- Cyes
- Dprobably
24The ______ is the value that best represents an entire group of scores.
- Amean
- Baverage
- Cmode
- Dmedian
25The ANOVA uses the ______.
- At test
- Br test
- Cp test
- DF test
26The appropriate method for calculating the degrees of freedom associated with a correlation coefficient is ______
- An-2
- Bn-1
- Cn-3
- Dn-4
27The correlation coefficient measures ______.
- Amean differences
- Bassociation
- Cprediction
- Dcausation
28The level of risk associated with the null hypothesis is generally set at ______.
- A0.10
- B0.20
- C0.001
- D0.05
29The most commonly used nonparametric test is the ______.
- At-test
- BANOVA
- Cchi-square
- DMann-Whitney U
30The most commonly used significance level researchers are willing to take in testing the null hypothesis is ______.
- A0.50
- B0.05
- C0.10
- D0.00
31The Pearson's correlation coefficient examines variables that are ______ in nature.
- Anot categorical
- Bnot continuous
- Ccategorical
- Dcontinuous
32The standard error of the mean is the best estimate that we can come up with given that it is impossible to compute ______.
- Aall of the possible standard deviations
- Ball of the possible medians
- Call of the possible means
- Dall of the possible variances
33The t test for independent means is used when you are testing how many groups?
- Aonly one group
- Bonly two groups in total
- Ctwo groups or more
- Done group or more
34The term associated with identifying differences between groups that are NOT due to chance is ______.
- Ameaningfulness
- Bstatistics
- Cprobability
- Dsignificance
35To compute the test statistic or t value, what must first be calculated to approximate the sample size?
- Adegrees of freedom
- Bstandard deviation
- Cpooled variance
- Dmean score
36Under the normal curve, approximately what percentage of scores falls between -1 and +1 standard deviations around the mean?
- A34%
- B68%
- C95%
- D14%
37Using every feature a computer program has to make charts likely results in which of the following?
- Agroup think
- Billustration
- Cpersuasion
- Dchart junk
38What is another name for a factorial ANOVA?
- Acomplex ANOVA
- Bone-way ANOVA
- Csimple ANOVA
- Dtwo-way ANOVA
39What is another name for the normal curve?
- Aprobability
- Bsymmetry
- Casymptotic
- Dbell-shaped curve
40What is the definition of the degree of risk you are willing to take that you will reject a null hypothesis when it is actually true?
- Achance
- BType II error
- Cstatistical significance
- DType I error
41What is the distance between each data point and the regression line called?
- Astandardized error
- Bstandard deviation
- Cerror in prediction
- Dstandard error of the estimate
42What is the mean value of the following scores: 117, 132, 147, 156, 196?
- A149.6
- B151.2
- C147.0
- D148.7
43What is the standard deviation for the following set of scores: 10, 15, 12, 18, 19, 16, 12?
- A11.29
- B17.78
- C6.47
- D3.36
44What is the standard deviation for the following set of scores: 20, 24, 26, 22, 18, 16, 18?
- A6.55
- B12.95
- C24
- D3.60
45What is the variance for the following set of scores: 10, 15, 12, 18, 19, 16, 12?
- A17.18
- B6.47
- C11.29
- D3.36
46What type of ANOVA is used when there is only one type of treatment or grouping factor with more than two levels?
- Atwo-way
- Bone-way
- Cthree-way
- Dfour-way
47When analysis of data reveals a difference between levels of a factor, what is this called?
- Amain effect
- Blevel effect
- Cfactor effect
- Dinteraction effect
48When humans first realized that counting was a good idea, which of the following became a useful skill for people to have?
- Aknowing the alphabet
- Basking questions
- Ccollecting information
- Dmaking decisions
49Which of the following is an example of a nondirectional hypothesis?
- AThere is no relationship between a high-fat diet and weight gain.
- BThere is a relationship between a high-fat diet and weight gain.
- CThere is a positive relationship between a high-fat diet and weight gain.
- DThere is a negative relationship between a high-fat diet and weight gain.
50Which of the following represents a nondirectional research hypothesis?
- AH1: X1 ≠ X2
- BH1: X1 < X2
- CH0: μ1 = μ2
- DH1: μ1 > μ2
Informações
- Descrição
- Quiz sobre Statistic Final Practice , criado por Michelle Nguyen em 12-12-2020.
- Autor
- Michelle Nguyen
- Idioma
- English
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