Multiple choice

If your score in an exam was 80 with a mean of 60, what would be the standardised score for this exam if the standard deviation is 15?

  1. 1.33

  2. 1.25

  3. 1.52

  4. 1.72
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A Correct answer
Explanation

Standardized score (z-score) is calculated as z = (x - mean) / standard_deviation. z = (80 - 60) / 15 = 20 / 15 = 1.333...

AI explanation

The formula for calculating a standardized score, or z-score, is Z = (X - Mean) / Standard Deviation. Substituting the given values into the formula gives Z = (80 - 60) / 15. This simplifies to 20 / 15, which equals 1.33.

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