Suppose the lengths of a women's pregnancies are normally distributed with a mean of 266 days and a standard deviation of 16 days.

Find the following for an individual randomly chosen pregnant woman:

a. The mean pregnancy length for her is,

x= days.

b. The standard deviation length for her is,

x= days.

In choosing a sample of 25 women, find the following:

c.The mean pregnancy length for the sample is,

x= days.

d. The standard deviation length for the sample is,

x= days.