Exhibit 12-2
Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classification. We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year.
-Refer to Exhibit 12-2. The null hypothesis
A)should not be rejected
B)should be rejected
C)was designed wrong
D)None of these alternatives is correct.

Question

Exhibit 12-2
Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classification.  We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year.
-Refer to Exhibit 12-2. The null hypothesis
A)should not be rejected 
B)should be rejected 
C)was designed wrong 
D)None of these alternatives is correct.

Quizplus · Accepted Answer

Without the details of Exhibit 12-2, it's assumed that the null hypothesis should not be rejected unless there is significant evidence against it.

Exhibit 12-2 Last School Year, the Student Body of a Local University