Which of the following is TRUE?
A) An example of an unbiased estimate is the variance of a sample; a typical biased estimate is the researcher's initial expectation prior to sampling.
B) There is only one biased estimate (i.e., the researcher's expected findings); there are several unbiased estimates.
C) A biased estimate is preferred to an unbiased estimate when the population is not normally distributed.
D) A sample's variance is a biased estimate of the population's variance, but a slight change in the variance formula gives an unbiased estimate.
D
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