need help now!!! Questions In a study designed to test the effectiveness of magn

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need help now!!!

Questions In a study designed to test the effectiveness of magnets for treating back pain, 32 patients were given a treatment with magnets and also a sham treatment without magnets. Pain was measured using a acale from (no pain) to 100 (extreme pain). The population standard deviation is unknown 4 of 10 questions saved Page 1: After given the magnet treatments, the 32 patients had pain scores with a mean of 6.2 and standard devistion of 2.7 After being given the sbam treatments, the 32 patients had pain scores with a mean of 7.5 and standand deviation of 2.1. Construct the 9g% confidence interval estimate of the mean pain score for panelas givea the mapnel treatment using STATCRUNCH d a Blank #1: Type the lower linit (keep 2 decimal places) Question 2 Saved Blank #2: Type the upper limit (keep 2 decimal places) O Type here to search

Explanation / Answer

For magnet treatment

sample size=n=32

mean=6.2

sd=2.7

alpha=1-0.98=0.02

alpha/2=0.02/2=0.01

df=n-1

tcrit=t=2.4528

98% CI for true mean of magnet treatments is

sample mean-t(smaple stddev/sqrt(n),

sample mean+t(smaple stddev/sqrt(n)

6.2-2.4528(2.7/sqrt(32),6.2+2.4528(2.7/sqrt(32)

5.03,7.37

5.03,7.37

lower limit of magnet treatment=5.03

upper limit of magnet treatment =7.37

98% CI for true mean of shm treatments is

sample mean-t(smaple stddev/sqrt(n),

sample mean+t(smaple stddev/sqrt(n)

7.5-2.4528(2.1/sqrt(32),7.5+2.4528(2.1/sqrt(32)

6.589,8.411

6.59,8.41

lower limit of sham treatment=6.59

upepr limit of sham treatment =8.41

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