The contingency table for a sample of corporate executives classified by educational level and the social activity follows. 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 contingency table for a sample of corporate executives classified by educational level and the social activity follows.  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 for the "above average" social activity and "high school" education, we need to multiply the row and column totals and divide by the sample size.

Expected frequency = (Row total for "high school" education) x (Column total for "above average" social activity) / Sample size

Expected frequency = (40) x (15) / 200 = 3 x 7.5 = 22.50

Therefore, the expected frequency for the "above average" social activity and "high school" education equals 22.50. The best choice is C.

The Contingency Table for a Sample of Corporate Executives Classified