The Dean of the Business School Wants to Estimate the Mean

Multiple Choice

The Dean of the Business School wants to estimate the mean number of hours worked per week by students. A sample of only 12 students showed a mean of 24 hours with a standard deviation of 4 hours. Find the 95 percent confidence interval for the population mean.

A) 21.46 and 26.54
B) 21.17 and 26.45
C) 22.88 and 25.12
D) 21.07 and 26.07
E) 21.93 and 26.07