Question

If a student scored 75 points on a test where the mean score was 83.5 and the standard deviation was 6.1. the student's z score is ________. round to 2 decimal places.

Answer 1

Answer: ( -1.5)

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Answer 2

The z score is -1.39

Explanation:

Taking into account, that the student score is 75 points, the mean score is 83.5 and the standard deviation is 6.1. The z score is calculated as:

`z=(x-m)/(s)`

Where x is the score that the student gets, m is the mean score and s is the standard deviation, so the z score is:

`z=(75-83.5)/(6.1)=-1.39`