Suggested answer to exercise: Alcohol consumption and sex, 5

Question 5: In what way are these groups more difficult to compare than are men and women?

Suggested answer

The smaller group has only 21 members, not really enough to ignore the large departures from the assumptions of the t method and use the large sample Normal method. This means that the confidence interval and P value are only approximate.

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Last updated: 31 October, 2006.

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