Suppose that each of two statisticians A and B independently takes a random sample of 20 observations from a normal distribution for which the mean p. is unknown and the known value of the variance is 4. Suppose also that statistician A finds the sample variance in his random sample to be 3.8, and that statistician B finds the sample variance in his random sample to be 9.4. For which random sample is the sample mean likely LO be closer to the unknown value of μ.?