In a large population of pregnant women, the mean weight gain during pregnancy was mu = 32lb(s) with standard deviation sigma = 6 lbs. Suppose 64 pregnant women from this population are randomly...

In a large population of pregnant women, the mean weight gain during pregnancy was mu = 32lb(s) with standard deviation sigma = 6 lbs. Suppose 64 pregnant women from this population are randomly selected by an obstetrician. The sampling distribution of the sample mean weight gain is: A. N(32,6) B. N(32, 0.75) C. (64,6) D. (4,6)