Confidence interval for the population mean.
The number of pups in wolf dens of the south-western United States is recorded below for 16 wolf dens.
|
5
|
8
|
7
|
5
|
3
|
4
|
3
|
9
|
|
5
|
8
|
5
|
6
|
5
|
6
|
4
|
7
|
(a) Use a calculator with mean and standard deviation keys to verify that the sample mean is x = 5.63 pups with the sample standard deviation s = 1.78 pups.
(b) Find a 75 percent confidence interval for the population mean number of wolf pups per den in the south-western United States.