The variance of binomial distribution is always:________________?
Correct answer: A. Less than mean
- A. Less than mean
- B. Equal to mean
- C. Greater than mean
- D. Equal to standard deviation
- E. None of these
Explanation
For a binomial distribution, mean = np while variance = npq. Since q is less than 1 for a non-degenerate binomial distribution, npq is less than np, so the variance is less than the mean.
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