Question

A researcher develops a technique to increase productivity in factory workers. He has workers report the amount of boxes they fill every day for a week and uses this as a pretest measure of productivity. Workers then attend a workshop in which they are instructed to do a specific warm up exercise to increase motivation to be productive by focusing on a pleasant activity. Workers again reported the amount of boxes they fill every day for a week, and the amount of boxes for a week is the posttest measure. If the counselor wants to see if there is an increase in productivity after attending his workshop using 15 workers and the 0.05 significance level, the cut off t score(s) will be:

15 workers sample is not given

Group of answer choices

+1.753

+1.762

±2.145

+2.145

Answer 1

[ explanation:-

it will be an upper tailed test...as we want to test if there is an increase in productivity after attending his workshop.

sample size (n) = 15

df = (n-1) = (15-1) = 14

t critical values for df = 14, alpha=0.05 , right tailed test be:-

[ using t distribution table ] ]

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