# The Sampling Distribution of a Sample Mean

## Sampling Distribution of Difference Between Means

### Answers

- The mean of the distribution of the difference between sample means is
equal to the difference between population means.
- The variance of the sampling distribution of the difference between
means is equal to the variance of the sampling distribution of the mean
for Pop plus the variance of the sampling distribution of the mean for
Pop .
- Mean = , SD = , Plug these into the normal calculator and find the
area above . You get. . A similar question using this data appears
in the text.
- Mean = = , Var = = , SD =
= , Use the normal calculator to calculate the area
above for a distribution with this mean and SD. You get .