A four-year university has decided to implement a new approach to teaching Stati

Question

A four-year university has decided to implement a new approach to teaching Statistics. Full-time
and adjunct professors were surveyed to determine whether they preferred the traditional lecture
approach or a computer approach to teaching Statistics. Use hypothesis testing to test the
independence of opinion between the two groups.
Table 11-3
Prefer Lecture Prefer Computer No Preference
Full-time 8 13 6
Adjunct 11 22 10

Calculate the expected value of an adjunct professor who prefers to lecture.
A) 21.50 B) 9.83 C) 11.67 D) 7.33

What is the expected value of an adjunct professor who prefers computer instruction?
A) 11.67 B) 21.50 C) 9.83 D) 13.50

Explanation / Answer

Perfer Lecture Perfer Computer No Preference Total Full-time 8 13 6 27 Adjunct 11 22 10 43 Total 19 35 16 70 Calculate the expected value of an adjunct professor who prefers to lecture Expected value is (43*19)/70 = 11.67 ANS: C What is the expected value of an adjunct professor who prefers computer instruction Expected value is (43*35)/70 = 21.5 ANS: B What is the expected value of an adjunct professor who prefers computer instruction Expected value is (43*35)/70 = 21.5 ANS: B Expected value is (43*35)/70 = 21.5 ANS: B Perfer Lecture Perfer Computer No Preference Total Full-time 8 13 6 27 Adjunct 11 22 10 43 Total 19 35 16 70

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