Exhibit 11-1 Last Year, the Standard Deviation of the Ages of the of the Students

Multiple Choice

Exhibit 11-1
Last year, the standard deviation of the ages of the students at UA was 1.8 years. Recently, a sample of 61 students had a standard deviation of 2.1 years. We are interested in testing to see if there has been a significant change in the standard deviation of the ages of the students at UA.
-Refer to Exhibit 11-1. At 95% confidence the null hypothesis

A) should be rejected
B) should not be rejected
C) should be revised
D) None of these alternatives is correct.