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0MIS 41

hsherwood02 18 questions Updated 19 Feb 2016

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Questions in this quiz (18)

  1. 1When we are interested in means, variances and proportions for populations, we are talking about
    1. AStatistics
    2. BParamaters
    3. CNone of these answers
    4. DInferences
  2. 2Making conclusions about population parameters based on sample statistics is known as
    1. Adescriptive statistics
    2. Bnone of these answers
    3. Cquantitative statistics
    4. Dinferential statistics
  3. 3A point estimate is defined as
    1. Aa single value that is the best estimate of an unknown population parameter
    2. Ba single value that is the best estimate of an unknown sample statistic
    3. Cthe proportion of the sample values
    4. Dthe average of the population values
  4. 4Find the value of the right-tail standard normal random variable Z for α = 10%
    1. A2.33
    2. B1.28
    3. C1.645
    4. D1.96
  5. 5The letter α in the formula for constructing a confidence interval estimate of the population mean is
    1. Athe probability that a confidence interval will not capture the population mean
    2. Bthe area in the lower tail of the sampling distribution of the sample mean
    3. Cthe probability that a confidence interval will capture the population mean
    4. Dthe level of confidence
  6. 6The letter α in the formula for constructing a confidence interval estimate of the population mean is
    1. Athe probability that a confidence interval will not capture the population mean
    2. Bthe area in the lower tail of the sampling distribution of the sample mean
    3. Cthe probability that a confidence interval will capture the population mean
    4. Dthe level of confidence
  7. 7A random sample of 10 waitresses at a Santa Clara restaurant revealed the following hourly earnings (including tips): 19, 18, 15, 16, 18, 17, 16, 18, 20, and 14.

    If the hourly earnings are normally distributed with a standard deviation of $4.50, estimate with 95% confidence the mean hourly earnings for all waitresses in Santa Clara.
    1. A(13.78, 20.42)
    2. B (16.65, 17.55)
    3. C(14.31, 19.89)
    4. Dnone of these answers
  8. 8How do you interpret the above confidence interval
    1. A95% of the data will fall within the confidence interval
    2. Bif we repeatedly draw samples of the same size from the same population, 95% of the intervals we create in this fashion will capture the true population mean
    3. Cwe are 95% confident that 5% of the values of the sample means will result in a confidence interval that includes the population mean
    4. Dwe are 95% confident that we have selected a sample whose range of values does not contain the population mean
  9. 9How large a sample of state employees should be taken if we want to estimate with 95% confidence the mean salary to within $2000? The population standard deviation is assumed to be $10,500.
    1. A74.58
    2. B105.88
    3. Cnone of these answers
    4. D1106.00
  10. 10A Type II error is committed if we make
    1. Aan incorrect decision when the null hypothesis is false
    2. Ban incorrect decision when the null hypothesis is true
    3. Can incorrect decision when the alternative hypothesis is true
    4. Dan incorrect decision when the alternative hypothesis is false

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Description
OMIS Quiz on 0MIS 41, created by hsherwood02 on 08/02/2014.
Language
English
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54
History
Created on 8 Feb 2014 · updated on 19 Feb 2016
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