Suppose That Scores for Men on an Aptitude Test Have

question 94

Multiple Choice

Suppose that scores for men on an aptitude test have greater variability than scores for women on the same test.In other words,the population standard deviation is greater for the population of men than for the population of women.Based on a sample of size 50,a 95% confidence interval for the mean score,μ,of all women has a margin of error of 2.2.Which of the following confidence intervals will have a smaller margin of error?
I.A 99% confidence interval for the mean score of women.Sample size = 50
II.A 95% confidence interval for the mean score of women.Sample size = 100
III.A 95% confidence interval for the mean score of men.Sample size = 50

• A)II
• B)I
• C)III
• D)I,II
• E)I,II,III

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