SOLVED: Hugo averages 76 words per minute on a typing test with a standard deviation of 12.5 words per minute. Suppose Hugo's words per minute on a typing test are normally distributed. Let X be the number of words per minute on a typing test. Then, X   N(76, 12.5). Suppose you type 66 words per minute on a typing test on Wednesday. The Z score when x = 66 is . This Z score tells you that x = 66 is standard deviations to the (left/right) of the mean, .

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