Probability 10

10. A liquid dietary product implies in its advertising that use of the product for one week results in an average weight loss of 3 pounds. Eight subjects use the product for one week and the resulting weight loss data are reported below. It is believed that weight loss follows a normal distribution. Subject 1 2 3 4 5 6 7 8 Initial Weight 163 201 195 198 155 143 150 187 (lbs) Final Weight 161 195 192 197 150 141 146 183 (lbs) Compute a 95% CI. for the mean difference in weight loss. Does the data support the advertiser's claim