Thank you Problem 4. A randomized experiment studied whether magnetic fields applied over a painfularea can reduce pain intensity. The subjects are 54 volunteers with postpolio syndrome whoreported muscular or arthritic pain. The pain level when pressing a painful area was gradedsubjectively on a scale from 0 to 10 (0 is no pain and 10 is maximum pain). Patients wererandomly assigned to wear either a magnetic device or a placebo device over the painful areafor 45 minutes. Here is a summary of the pain scores for this experiment, expressed as samplemeans + sample standard deviations:Magnetic device Placebo devicen1 = 299.6+0.74.4+n2 = 25Pre-treatment9.5+0.8Post-treatment8.4+1.8Change5.2+3.21.1+1.6Post/Share(1). Is there any evidence that the magnetic device is better than a placebo device in terms ofreducing pain at the significance level a = 0.05?(2). Is there any evidence that the magnetic device can reduce pain at the significance levela = 0.05?(3). Please give a 95% confidence interval for the mean difference in pain scores pre- and post-treatment among patients given the magnetic device.

Name: Thank you Problem 4. A randomized experiment studied whether magnetic
Uploaded: 2024-03-20T07:06:41.000Z
Channel: Bartleby
Description: Thank you Problem 4. A randomized experiment studied whether magnetic fields applied over a painfularea can reduce pain intensity. The subjects are 54 volunteers with postpolio syndrome whoreported muscular or arthritic pain. The pain level when pres