The Dean of the Business School Wants to Estimate the Mean

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