Question: A researcher was interested in learning if following the Atkins diet resulted in greater weight loss than following the Weight Watchers diet. Twenty persons who had made New Year’s resolutions to diet were randomly assigned to one of two treatment conditions: Atkins (N = 10) and Weight Watchers (N = 10). The dieters were instructed to follow the rules of the diet to which they were assigned for a six-week period. The number of pounds each dieter lost are represented below.

Weight Loss in Number of Pounds

Atkins Diet Weight Watchers

18 14 16 12 17 12 10 8 15 13

13 17 15 14 19 14 11 6 9 7

Choose the appropriate t-test and using Excel determines whether there is a significant difference in weight loss between the two groups. Explain your findings in words.