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 expected frequency of seniors is
A)60
B)20%
C)68
D)64

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 expected frequency of seniors is
A)60 
B)20% 
C)68 
D)64

Quizplus · Accepted Answer

The expected frequency of seniors is calculated based on the total number of observations and the proportion of seniors in the population. Without the exhibit, we assume the expected frequency is given directly as 60.

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