A small pilot study is conducted to investigate the effect of a nutritional supplement on
total body weight. Six participants agree to take the nutritional supplement. To assess
its effect on body weight, weights are measured before starting the supplementation
and then after 6 weeks. The data are shown below. Is there a significant increase in
body weight following supplementation? Use a paired t-test at a 5% level of
significance.
1. df=_____ (2 points)
2. Critical value: ______ (2 points)
3. Computed statistic:_____ (2 points)
4. Based on comparing the computed statistic to the critical value which of the following
is (are) true? (4 points)
a. There is significant evidence, alpha=0.05, to show that body weight increased
following supplementation?
b. There is not significant evidence, alpha=0.05, to show that body weight increased
following supplementation?
c. Statistically speaking the difference in initial weights and weights after 6 weeks is 0.
d. b and
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