# 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.

(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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