Question

The water diet requires one to drink two cups of water every half hour from when one gets up until one goes to bed, but otherwise allows one to eat whatever one likes.  Four adult volunteers agree to test the diet.  They are weighed prior to beginning the diet and after six weeks on the diet. The weight in pounds are

Person 1 2 3 4

Weight before the diet 180 125 240 150

Weight after the diet 170 130 215 152

Assuming that weight loss after six weeks is normally distributed for all adults (d = weight before - weight after), test the following hypothesis:

H_o: µ_d = 0

H_a: µ_d > 0

What is the correct conclusion?

	A.	Reject Ho  at significance level 0.05 but not at 0.01.
	B.	Reject Ho  at significance level 0.10 but not at 0.05.
	C.	Reject Ho  at significance level 0.01.
	D.	Fail to reject Ho  at significance level 0.10.

Answer 1