Use a paired t-test at a 5% level of significance. what is critical

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 

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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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