Use statdisk and find the 90% confidence interval for 6. This is from section 9-4 of elementary statistics.

5. Mind over matter? Abel is determined to know if hypnotism can increase strength. Using his mastery of the mysterious powers of the mind, he runs the following experiment. Shown below are the weight (in pounds) the subjects could bench press before and after hypnotism. Test the claim that hypnotism is effective in increasing strength. Use a significance level of .05. Subject 1 2 3 4 5 6 7 8 Before 210 230 182 205 262 253 219 216 After 219 236 179 204 270 250 222 216 6. Create and interpret a confidence interval of the appropriate level for the true difference in means from the previous