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A student scored 71 points on a test where the mean score was 79 and the standard deviation was 6. What is the student's z-score?

A student scored 71 points on a test where the mean score was 79 and the standard deviation was 6.

What is the student's z-score?

a. 13.17

b. 0.22

c. 0.22

d. 1.33

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