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
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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