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.

Question

Quizplus · Accepted Answer

The Answer of 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.

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