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Today, 04:08

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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  1. Today, 06:01
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    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.
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