You Wish to Construct a 95% Confidence Interval to Compare

question 6

Multiple Choice

You wish to construct a 95% confidence interval to compare the mean measurement for two groups.A small pilot study yields sample standard deviations of 10 and 12 for Group 1 and Group 2,respectively.If we wish to obtain a margin of error of at most 2,what sample size should we take from each group? Assume equal sample sizes.

• A)232
• B)233
• C)235
• D)234
• E)231

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