Statistics 1 homework please help

Posted on 2014-03-13 08:49:00 in Statistics by FRANK

According to a recent marketing campaign, 100 drinkers of either Diet Coke or Diet Pepsi participated in a blind taste test to see which of the drinks was their favorite. In one Pepsi television commercial, an anouncer states that "in recent blind taste tests, more than one half of the surveyed preferred Diet Pepsi over Diet Coke." Suppose that out of those 100, 57 preferred Diet Pepsi. Using ?=0.01 as your benchmark for declaring significance, test the hypothesis that more than half of all participants will select Diet Pepsi in a blind taste test by giving the following:



(a) the z-score for the sample is





(b) the critical z score for declaring significant evidence is

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