Question

Refer to part c in the previous exercise.
Calculate the 95% confidence interval comparing the population means for women and men. Interpret the result including the relevance of 0 being within the interval or not.
a. Show that a 99% confidence interval is (10.0, 16.2). (For such large sample sizes, the t -score is practically identical to a z -score.)
b. Explain why this interval is wider than the 95% confidence interval.


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  • CreatedSeptember 11, 2015
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