Wk2 Disc2

A pilot study was conducted to evaluate the effectiveness of pain alleviation in patients with facial shingles. 24 patients were randomly assigned to one of 2 treatment groups; rest vs. acupuncture. After two weeks of treatment, the subjects were then asked to rate their pain on a scale from 1 to 10 with 10 being the most pain they have ever experienced. Two sample T hypothesis test: μ 1 : Mean of Rest μ 2 : Mean of Acupuncture μ 1 - μ 2 : Difference between two means H 0 : μ 1 - μ 2 = 0 H A : μ 1 - μ 2 ≠ 0 (with pooled variances) Hypothesis test results: Difference Sample Diff. Std. Err. DF T-Stat P-value μ 1 - μ 2 0.9166 0.9844 22 0.9311 0.3619 Two sample T confidence interval: μ 1 : Mean of Rest μ 2 : Mean of Acupuncture μ 1 - μ 2 : Difference between two means (with pooled variances) 95% confidence interval results: Difference Sample Diff. Std. Err. DF Critical t L. Limit U. Limit μ 1 - μ 2 0.9166 0.9844 22 2.0738 -1.1248 2.9582 1. State the null and alternative hypothesis.