Which is not a measure of variability? A) Mean absolute deviation (MAD) B) Range

Question

Which is not a measure of variability? A) Mean absolute deviation (MAD) B) Range C) Coefficient of variation D) Trimmed mean

If Excel's sample skewness coefficient is positive, we conclude that:

A) the population is skewed to the right, if the sample size is small.

B) the population is symmetric, as long as the sample size is very large.

C) the coefficient is within the range of chance for a symmetric population

D) we should consult a table of percentiles that takes sample size into consideration

Explanation / Answer

Which is not a measure of variability?

Answer: Trimmed mean

If Excel's sample skewness coefficient is positive, we conclude that:

Answer: the population is symmetric, as long as the sample size is very large.

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