Question 9) Heart rate was measured in four groups of adult's subjects: Control, using drug A, using drug b, and using drug C

Source DF SS MS F

Model 3 1000 333.3 7.47

Error 56 2500 44.64

Correctedtotal 59 3500

a)Do these data provide sufficient evidence to indicate a difference in the mean heart rate among these four types of subjects? Let =0.05.

1.Yes, Since F statistics is greater than F value from F table we can conclude from these data to indicate a difference in the mean heart rate among these four types of subjects

2.No, Since F statistics is lessthan F value from F table we cannot conclude from these data to indicate a difference in the mean heart rate among these four types of subjects

b)Using Tukey's multiple comparison output which groups are different?

1.Control is different from drug A, B, and C

2.Drug A s different from drug B

3.Drug A is different drug C

4.All of Above

Means with the same letter are not significantly different.

TukeyGrouping Mean N x

A 85.2 15 Control

B 74.3 15 Drug A

C 70.3 15 Drug B

D 69.6 15 Drug C