To determine if Reiki is an effective method for treating pain, a pilot study was carried out where a certified second-degree Reiki therapist provided treatment on volunteers. Pain was measured using a visual analogue scale (VAS) immediately before and after the Reiki treatment (Olson & Hanson, 1997). The data is in is in following table: Table: Pain Measures Before and After Reiki Treatment VAS before VAS after 6 3 2 1 2 O 9 1 3 O\f4 4 4 1 7 6 2 4 3 8 8 Let My = mean visual-analog scale (VAS) reading before Reiki treatment. Let #2 = mean visual-analog scale (VAS) reading after Reiki treatment. Compute a 90% confidence level for the mean difference in VAS score from before and after Reiki treatment. (i) Determine the sample mean of differences xa N W 40'F A(i) Determine the sample mean of differences xa Enter in decimal form to nearest hundredth. Examples of correctly entered answers: 0.25 0.01 1.38 11.25 A/