In a recent study on patient's recovery from stroke, one group was given training in biofeedback while the other group was kept as a control group. Responses report the number of seconds required for the patients to stand from a sitting position and then sit down again. The data is as follows: Control Group Biofeedback Group 5.1 1.9 4.7 2.6 3.9 4.3 4.2 2.1 4.7 2.7 4.3 4.1 4.2 3.2 5.1 4.0 3.4 3.2 4.2 3.5 5.1 2.8 4.4 3.5 4.0 3.1 3.4 2.3 3.9 3.5 Since there are only 15 samples in each group, we cannot assume a normal distribution. Using a Rank Sum Test [Mann-Whitney], determine if there is sufficient evidence that biofeedback can help stroke patients recover. Critical U Values for n1=15, m=15 U Alpha=0.001 36 Alpha=0.{)05 46 Alpha=0.01 5 l Alpha=0.02 56 Alpha=0.05 64 Alpha=0. 10 72 Alpha=0.20 80