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(CORRECT ANSWER) MATH225N Week 8 Final Exam : Hugo averages 56 words per minute on a typing test with a standard deviation of 6.5 words per minute.

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QUESTION 49

Hugo averages 56 words per minute on a typing test with a standard deviation of 6.5 words per minute. Suppose Hugo’s words per minute on a typing test are normally distributed. Let X= the number of words per minute on a typing test. Then, X∼N(56,6.5).

Suppose Hugo types 67 words per minute in a typing test on Wednesday. The z-score when x=67 is ________. This z-score tells you that x=67 is ________ standard deviations to the ________ (right/left) of the mean, ________.

Correctly fill in the blanks in the statement above.

Select the correct answer below:

Suppose Hugo types 67 words per minute in a typing test on Wednesday. The z-score when x=67 is −1.158. This z-score tells you that x=67 is 1.158 standard deviations to the left of the mean, 56.

Suppose Hugo types 67 words per minute in a typing test on Wednesday. The z-score when x=67 is −1.692. This z-score tells you that x=67 is 1.692 standard deviations to the left of the mean, 56.

Suppose Hugo types 67 words per minute in a typing test on Wednesday. The z-score when x=67 is 1.692. This z-score tells you that x=67 is 1.692 standard deviations to the right of the mean, 56.

Suppose Hugo types 67 words per minute in a typing test on Wednesday. The z-score when x=67 is 1.158. This z-score tells you that x=67 is 1.158 standard deviations to the right of the mean, 56.

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