A Computer Package Was Used to Generate the Following Printout

Multiple Choice

A computer package was used to generate the following printout for estimating the sale price of condominiums in a particular neighborhood. What assumptions are necessary for any inferences derived from this printout to be valid?

A) The population mean has an approximate normal distribution.
B) The sample variance equals the population variance.
C) The sample was randomly selected from an approximately normal population.
D) All of these are necessary.