A union official wants to estimate the mean hourly wage of it's members. A random sample of 64, taken from a normal population shows the sample mean is $18.30 and the sample standard deviation is $3.25.
a. Find a 90% CI for m
b. Find a 95% CI for m
c. Find a 98% CI for m
d. Find a 99% CI for m
The confidence intervals for the mean hourly wage of the members of a union are determined.