You want to determine whether the amount of coffee that "coffee drinkers" consume on a weekly basis differs depending on whether the coffee drinker also smokes cigarettes. You seek 20 volunteers from your college campus to participate.Ten college students reported that they consume coffee but do not smoke cigarettes; these comprise the Coffee-Only group, or Group 1.Another ten college students reported that they consumed coffee and also smoked cigarettes; these comprise the Coffee + Cigarettes group, or Group 2.Then you ask them to monitor the frequency of 8 ounce cups of coffee they consumed over a seven day period.The frequency of 8 ounce cups of coffee consumed in a week by each participant are listed below for each group.

X1

Coffee-Only

13

19

17

11

21

20

24

25

22

18

X2

Coffee + Cigarettes

19

25

25

29

35

21

12

28

22

27

Set alpah at = .05, and complete step 4 of the hypothesis testing procedure, what decision should the researcher make regarding the effect of smoking cigarettes on coffee consumption?

a. The researcher should retain H0and conclude that cigarette smoking has no effect on coffee consumption

b. The researcher should reject H0and conclude that cigarette smoking has an effect on coffee consumption

c. The researcher should reject H0and conclude that cigarette smoking decreases coffee consumption

d. The researcher should reject H0and conclude that cigarette smoking has no effect on coffee consumption

e. The researcher should reject HAand conclude that cigarette smoking has an effect on coffee consumption