An army officer wants to compare his soldiers’ satisfaction with two exercise pl
ID: 3044896 • Letter: A
Question
An army officer wants to compare his soldiers’ satisfaction with two exercise plans. He has one group run 3 miles every morning, and another group run 1 mile and do weight training for one half hour every morning. At the end of a month he measures their satisfaction by asking them to rate their exercise plan on a scale of 1 to 10. Higher ratings mean more satisfaction. He computes t (18) = 2.69, p < .05. The runners’ group mean was 5.85; the run-and-lift group mean was 7.10. Which of the following statements expresses the direction of the relationship?
A. The difference was statistically significant.
B. The difference was practically significant.
C. Soldiers in the run-and-lift exercise plan expressed statistically significantly more satisfaction than soldiers in the running-only exercise plan.
D. Soldiers in the run-and-lift exercise plan expressed statistically significantly less satisfaction than soldiers in the running-only exercise plan.
A. The difference was statistically significant.
B. The difference was practically significant.
C. Soldiers in the run-and-lift exercise plan expressed statistically significantly more satisfaction than soldiers in the running-only exercise plan.
D. Soldiers in the run-and-lift exercise plan expressed statistically significantly less satisfaction than soldiers in the running-only exercise plan.
Explanation / Answer
Option c) is correct.
Soldiers in the run and lift exercise plan expressed statistically significantly more satisfaction than soldiers in the running only exercise plan.
Since P value is less than 0.05 and it's mean is greater.
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