Question

8.

To test which natural or artificial sweetener animal subjects prefer, a researcher had rats consume water that had been sweetened with either sucrose, aspartame (Equal®), or sucralose (Splenda®). The amount of liquid consumed (in milliliters) was recorded; the summary data appear below:

sweetener
sucrose	aspartame	sucralose
T = 64 SS = 30 n = 8	T = 56 SS = 24 n = 8	T = 88 SS = 30 n = 8

a) What is the critical value for F (to two decimal places) if alpha = .05?

b) Based on the critical value above, should you reject the null hypothesis (answer yes or no)?

From the information above, answer the following questions:

a) What is the mean of the sucrose condition?

b) What is the mean of the aspartame (Equal) condition?

c) What is the mean of the sucralose (Splenda) condition?

Based on your answer to the questions above, if Tukey's HSD = 2.52 (you do NOT have to calculate this value yourself!!!), which of the following conclusions are warranted?

Choose all the apply!

		There is no significant difference in preference between sucrose and sucralose.
		There is no significant difference in preference between sucrose and aspartame.
		Aspartame is preferred significantly more than sucrose.
		There is no significant difference in preference between sucralose and aspartame.
		Sucralose is preferred significantly more than sucrose.
		Sucrose is preferred significantly more than sucralose.
		Aspartame is preferred significantly more than sucralose.
		Sucralose is preferred significantly more than aspartame.
		Sucrose is preferred significantly more than aspartame.

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Answer 1