Question

A clinical trial is run to assess the effects of different forms of regular exercise on HDL levels in a sample of healthy men between the ages of 18 and 29. Participants in the study were randomly assigned to either one of three exercise groups (Weight training, Aerobic exercise or Yoga) or to a control group in which they were assigned to a regular exercise program. Participants were instructed to follow the program for 8 weeks. Their HDL levels were measured after 8 weeks and are summarized below. If we run the test at a 5% level of significance, is there a significant difference in mean HDL levels among the groups? HINT: SSE = 1129.76.

weight training: n = 10 mean= 52.7 STD Dev= 5.97

Aerobic Exercise: n= 10 mean= 43.1 STD Dev= 11.1

Stretching/Yoga: n= 10 mean= 57.0 STD Dev= 12.5

Control: n= 10 mean= 60.9 STD Dev= 13.3

Indicate the correct competing hypotheses:

Indicate the decision rule.

Answer 1