If y = ax + b, what is the standard deviation of y?
Correct answer C. |a| × S.D. of x
Explanation
Adding b does not change spread, while multiplying by a scales all deviations, so S.D.(y) = |a| × S.D.(x).
Tip: press A, B, C or D to answer, and N for the next question.
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More Measures Of Dispersion questions
See allWhat is the lack of uniformity in the sizes of items called?
Correct answer B. Variation
The second moment about the mean is always equal to the?
Correct answer C. Variance
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Which of the following is a measure of relative dispersion?
Correct answer D. Coefficient of quartile deviation
Quartile deviation is not capable of further ____ treatment. Which word fills the blank?
Correct answer A. Algebraic
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