m = 500 and s = 60; The mean of a sample drawn from this population equals 459. Which of the following statements is invariably correct?
a. The sample was not randomly selected.
b. The sample was too small to be an accurate reflection of the population.
c. Great! The mean of a sample is always smaller than the mean of the corresponding population.
d. The variance of the sample must be larger than the variance of the "parent population."
e. None of the above are true.
Ans: e
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