A consultant for a company recommends an \"employee athlete\" program, encouragi

Question

A consultant for a company recommends an "employee athlete" program, encouraging every employee to devote 5 minutes an hour to physical activity. The company worries that the gains in productivity will be offset by the loss in time on the job. They'd like to know if the program increases or decreases productivity. To measure it, they monitor a random sample of 195 employees, measuring their hourly keystrokes both before and after the program is instituted. Use the table below to answer parts a through c below.

Explanation / Answer

H0: Difference = 0
H1: Difference not equal to 0 (they want to check whether difference increases or decreases)

We can use a paired sample t-test in this case.

Test statistic (t) = (Mean - 0) / (SD / SQRT(N)) = 58 / (93.9 / SQRT(195)) = 8.625

Two-sided P-value = T.DIST.2T(8.625,195 -1) = 0.000

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