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The director for Weight Watchers International wants to determine if a change in their program results in better weight loss at the 5% significance level.

The director for Weight Watchers International wants to determine if a change in their program results in better weight loss at the 5% significance level. The director selected 25 Weight Watcher members at random. The weight of each member was recorded at the start and end of the program 6 months later. The results are in this excel file

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