Six students took a national standardized test for which the average score was 700 and the standard deviation was 150. If a student’s z-value is 1.75 on the test, what was the student’s score?

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19-05-2017
Mathematics

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Six students took a national standardized test for which the average score was 700 and the standard deviation was 150. If a student’s z-value is 1.75 on the test, what was the student’s score?

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BlueSky06 BlueSky06 · Answer 1 · 2017-06-01T14:31:03+02:00

z-score is calculated through the equation below.
z-score = (x - u) / d
where x is the value, u is the mean or also known as average, and d is the standard deviation.

Substituting the known values to the equation,
1.75 = (x - 700)/150
The value of x is equal to 962.5. Therefore, the student's score is equal to 962.5.

valeriesati valeriesati · Answer 2 · 2020-05-05T17:18:53+02:00

valeriesati valeriesati

05-05-2020

Answer: d. 963

Step-by-step explanation:

took the test

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