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. Critical value: ______
3. Computed statistic:_____
4. Based on comparing the computed statistic to the critical value which of the following is true?
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