Question
Twenty students each score a mark of 20 out of a maximum of 40 marks in a test. What is the standard deviation of the scores for the twenty students? a. 2 b. 0 c. \( 1 / 2 \) d. 1
Ask by Fleming Mcdonald. in Guyana
Mar 15,2025
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Answer
The standard deviation of the scores is 0.
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Since all twenty students scored the same mark of 20, the standard deviation is 0. Standard deviation measures the amount of variation or dispersion of a set of values. When all values are identical, as in this case, there is no variation at all. So, the correct answer is: b. 0