Under what circumstances does the variance produce an estimate of the population variance that is downwardly biased?
A. When sample size is very small; N < 50.
B. When sample size is large; N >100.
C. There are no circumstances under which the variance produces a biased estimate.
D. The only instances where a population variance can be downwardly biased is when the mean = median = mode.
A. When sample size is very small; N < 50.
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