Why is the standard deviation used more frequently than the variance? Choose the correct answer below. OA. The standard deviation is easier to compute. OB. The standard deviation requires less entries from the data set. OC. The units of variance are squared. Its units are meaningless.

Q: d. Compute the mean, median, and mode.

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Q: From the data below find Mean, Variance, and Standard Deviation.         X          Y        120…

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A: The mean is,…

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A: Solution: Let X be the score. From the given information, X=77, σ=8 and z=–0.75.

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