6. Suppose a researcher wants to evaluate the effect of new diet on
weight loss. He randomly selected six subjects and let them use
the diet for 2 months; then he compared the weights before and
after the diet:
Patient Weight before(kg) Weight After(kg)
1
2
3
4
5
6
100
89
83
95
109
94
91
84
80
93
103
90
.
• Test at a = 0.05 if there was a statistically significant average
decrease in weight from before diet treatment to 2 months
after.