QUESTION #8 (20 marks)

A researcher is interested in whether different forms of exercise are effective in achieving weight loss among a group of males and females who have starting weights over 250 pounds. The researcher randomly assigns a group of males to either a high or low impact exercise program and does the same with a group of females. The researcher is most interested in whether the weight loss will differ by gender depending on whether they engage in a high or low impact exercise program. Below is the data for how many pounds were lost in each of the conditions. Test at analpha at 0.05and use all the steps of hypothesis testing for full marks.

Table 4.Weight loss for males and female in either high or low impact exercise programs.

GENDER

Exercise

Male

Female

High impact

76 78 76 76 76 74 74 76 76 55

65 90 65 90 65 90 90 79 70 90

Low impact

88 76 76 76 56 76 76 98 88 78

65 67 67 87 78 56 54 56 54 56