If a distribution is right skewed, which of the following is/are true?
I. It cannot be normally distributed.
II. Its skewness is negative.
III. It has a positive mean.
IV. Large positive deviations dominate large negative deviations.
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A. B. C. D. E. F.Explanation
A normal distribution is symmetrical and hence, has zero skewness i.e. it is neither positively nor negatively skewed. If the distribution is right skewed, its skewness is positive but it does not necessarily have a positive mean.