Question

18. A researcher wished to compare the effect of the frequency of the rate of stepping on heart rate in a step-aerobics workout. A collection of 30 adult volunteers, 15 women and 15 men, was selected from a local gym. The men were randomly divided into three groups of five subjects each. Group 1 at aow rats of stepping, Group 2 at medium race of stepping, an divided into three groups group did a standard step-aerobics workout with Group 1 at a low rate of stepping, Group 2 at a medium rate of stepping, and Group 3 at a rapid rate. The mean heart rate at the end of the workout for all subjects was determined in beats per minute. A partial ANOVA table for these data is given below. group did a standard step- rkout with 3 atírrapidrate >The women were also randomly bjects each. As with the men, each Analysis of variance for heart rate: Source step rate gender group*gender 2 Error Total 2553.2 70.7 231.7 1276.6 5.32 0.012 70.7 0.29 0.595 115.9 0.48 0.623 24 5762.0240.1 8617.6 Since there is little evidence of interaction and the stepping is si nt, we can conclude that-the p e for the _rapia rate of exercise is higher than the other two groups. B) low rate of exercise is lower than the other two groups. low rate of exercise is lower than that of the medium rate group. D) None of the above

Answer 1

Analysis of variance for heart rate 2 step rate gender group*gender 2 Error Total 2553.2 70.7 231.7 5762.0 8617.6 1276.6 5.32 0.012 70.7 0.29 0.595 115.9 0.48 0.623 24 29 240.1 Since there is li stepping is si of interaction and the t, we can con e for Ax Tapid rate of exercise is higher than the other two groups. B) low rate of exercise is lower than the other two groups. low rate of exercise is lower than that of the medium rate group. D))None of the above nswer: (D) None of the above lanation To know which group differs from which group we should go for post-hoc test. That tells us which group differs from which group. Anova result can tell whether there is a different or not, it cannot say more than that.