Question

A random sample of 60 married couples who have been married 7 years was asked the number of children they have.The results of the survey are as follows:
(a) What is the shape of the distribution of the sample mean? Why?
(b) Compute a 95% confidence interval for the mean number of children of all couples who have been married 7 years. Interpret this interval.
(c) Compute a 99% confidence interval for the mean number of children of all couples who have been married 7 years. Interpret this interval.


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  • CreatedApril 28, 2015
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