Which of the Following Is TRUE

Multiple Choice

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.