The educational level and the social activity of a sample of executives follow. What does the expected frequency for the "above average" social activity and "high school" education equal?
A) 9.50
B) 60.00
C) 22.50
D) 28.50

Question

The educational level and the social activity of a sample of executives follow.  What does the expected frequency for the "above average" social activity and "high school" education equal?
A) 9.50 
B) 60.00 
C) 22.50 
D) 28.50

Quizplus · Accepted Answer

To find the expected frequency we need to multiply the marginal totals for each category and divide by the total sample size. The total sample size is 90, so for "above average" social activity and "high school" education the expected frequency is (36/90) x (90/90) x 90 = 22.50. Therefore, the best choice is C.

The Educational Level and the Social Activity of a Sample