Use the following for questions 7 and 8: The to bed, but otherwise allows one to

Question

Use the following for questions 7 and 8: The to bed, but otherwise allows one to are weighed prior to beginning the diet and after six weeks on the diet.> requires one to drink two cups of water every half hour from the time one gets up until one goes eat whatever one likes. Four adult volunteers agree to test the diet. They Which o the following conditions must be met in order to use a f-procedure on these paired (a) Only the distribution of pre-diet weights must be approximately Normal. (o) The distribution of both pre-diet weights and six-week weights must be approximately (d) The distribution of pre-diet weights and the distribution of differences (after 6 weeks (b) Only the distribution of differences (after 6 weeks-before) must be approximately No Normal. must be approximately Normal. l three distributions-before diet, after 6 weeks, and the difference must be approximately Normal 8. A Type II error in this setting would mean ncluding that the diet leads to weight loss when it doesn't. (b) concluding that the diet leads to weight loss when it really does. (c) not concluding that the diet leads to weight loss when it does. not concluding that the diet leads to weight loss when it really doesn't. (e) drawing a conclusion from this test when the Normality condition has not been satisfied.

Explanation / Answer

(7) When doing a paired t test (as in this case) a major assumption or condition to be met is that the distribution of the differences of the dependent variable should be approximately normally distributed.

Therefore Option B is the correct answer

(8) A Type II error means incorrectly retaining a false null Hypothesis.

The Hypothesis would be

H0: There is no change in mean weight; D = 0 (There is no weight loss)

Ha: There is a difference in mean weight; D < 0 (There is a weight loss)

So Option C is the correct answer. Not concluding that the diet leads to weight loss, when it actually does.

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