Question

Test: Practice Exam 2 (HW 4 thru HW 6) ALLA PEKMEZ 07/29/2006 This Question: 1 pt Time Remaining: 003804 Suome 3 of 13 (2 complete This Test: 13 pts por In a study designed to test the effectiveness of images for treating back pants were given me wages and women who mare Panoured using a scale from ono 100 extreme par Aher geen the magnetron, the parts had an scores with a man of 110 and a standard deviation of 23 Aherbergen the shares the petsad pon scores with a man 11 4 and a standard deviation of 29 Complete parts through) a Construct the 90% confidence interval estimate of the mean score for patients given the magnet What is the confidence interval estimate of the population mean? Round to one decimal place anded) b. Construct the 90% confidence interval estimate of the mean score for patients on the street What is the confidence interval estimate of the population mean? (Round to one decimal place as needed)

Answer 1

n=35 treatment without megnet treatment with magnet Hi=11 O, = 2.3 M2=11.4 nm = 35 with magnet ãi = 11 Sham treatment with and magnet 522=11.4 52=2.9 Si=2.3 for goy. CI, Q=0.10 &q=0.05 df=n-1=34 = 1.691 *xizin- (a) Formagnet trecetment, E,= ** = 1.091 x 2.3 135 -0.0574 ca- (55-6,5€+ €) = (11-0.0574, 11+0.6574) = (10.3, 11.7) ..110.3 A<11.7 (3) For Sham trecet ment, Ez=+* S2 um 2.9 = 1.691x 35 = 0.83 20.8 !.CI = (57,62,5c2tez) = (11.4 -0.8,11.4+0.8) 110.6,12.22) 10.6 <M<12.2 CS Scanned with CamScanner