1. To determine the effectiveness of a new weight control diet, ten randomly selected students observed the diet for 4 weeks with the results shown below.

Dieter Weight Before Weight After

A 188 185

B 151 147

C 129 132

D 125 127

E 168 155

F 139 131

G 152 144

H 140 142

I 137 137

J 180 175

1. Set up the null and alternative hypotheses to see if this diet is effective.

1. Construct a 95% confidence interval estimate for the true amount lost on this diet.