Human beta-endorphin (HBE) is a hormone secreted by the pituitary gland under conditions of stress. An exercise physiologist measured the resting blood concentration of HBE in two groups of men: Group 1 consisted of 12 men who had been regularly jogging, and Group 2 consisted of 12 men who were not physically active. It is thought that the stress-relief of physical exercise will lower HBE in the blood. Concentration of HBE Joggers Not Physically Active 11 27 15 28 18 29 19 32 22 36 30 37 37 44 39 46 39 52 41 52 42 54 43 70 N = 12 N = 12 Mean = 29.667 Mean = 42.25 Std Dev = 11.904 Std Dev = 13.137 a) Tests of normality reveal that concentration of HBE does follow a normal distribution. For these data, run the appropriate test of hypothesis to determine if joggers have lower concentrations of HBE in their blood than men who are not physically active. Use a=0.01