Practice Question 31 A human resources manager wants to conduct a “before/after”

Question

Practice Question 31

A human resources manager wants to conduct a “before/after” study on 16 employees to determine if a motivation seminar results in an increase in their ratings of the company. The after-ratings are subtracted from the before-ratings to get the differences in the ratings and the average difference is computed to be -1.13 with a sample standard deviation of 2.4. The critical or table value of the test statistic to set the decision rule in the test of the hypotheses at 0.05 level of significance is _____________.

Explanation / Answer

Sollution:

given d bar=-1.13

sd=2.4

sample size=n=16

t=-1.13/2.4/sqrt(16)

=-1.883

ANSWER E

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