15.76 Reducing Cholesterol A drug was developed for reducing cholesterol levels in heart patients. The cholesterol levels before and after drug treatment were obtained for a random sample of 25 heart patients with the following results:

a. Use the sign test to determine whether or not this drug reduces the cholesterol levels of heart patients. Use a = 0.01.

b. Use the Wilcoxon signed-rank test to test the Data hypothesis in part a at the 1% level of significance. Are your conclusions the same as those in part a?

Transcribed Image Text:

Patient Before After Patient Before After 123 257 243 14 210 217 222 217 15 263 243 177 174 16 214 198 4 258 260 17 392 388 5 294 295 18 370 357 6 244 236 19 310 299 7 390 383 20 255 258 8 247 233 21 281 276 9 409 410 22 294 295 10 214 216 23 257 227 11 217 210 24 227 231 12 340 335 25 385 374 13 364 343