Using the following statistical data, answer and interpret the following information: 1. In an experiment where it is desired to identify the reduction of pain in the knee, a new drug in an experimental group and placebo in the control group. According to the intervention carried out, the following results were obtained. Statistical significance of 0.05. (10 points) a. What is the statistical test used? b. What is the interpretation of the results.

tab2 Cessation RRgroup, chil expected column exact -> tabulation of Cessation by RRgroup Key frequency expected frequency column percentage Reduce knee Randomly Assigned pain Condition Treatment Experimen Total No 118 87 205 105 .1 99.9 205 .0 72 . 84 56. 49 64.87 Yes 4 4 67 111 56.9 54.1 111 .0 27.16 43 . 51 35 . 13 Total 162 154 316 162.0 154.0 316.0 100 .00 100 .00 100 .00 Pearson chi2 (1) = 9. 2570 Pr = 0. 002 Fisher's exact = 0 . 003 1-sided Fisher's exact = 0 . 002