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% conï¬dence interval for the mean number of children of all couples who have been married 7 years. Interpret this interval.

(c) Compute a 99% conï¬dence interval for the mean number of children of all couples who have been married 7 years. Interpret this interval.

The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...

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