The following table lists the mean and standard deviation of several different normal distributions. In each case, a sample of 20 individuals was taken, as well as a sample of 50 individuals. For each sample, calculate the probability that the mean of the sample was less than the given value.

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TABLE FOR PROBLEM 27 Mean Value -5-5 1010 -55-55 1212 Standard deviation 55 3030 2020 33 -5.2-5.2 8.08.0 -61.061.0 12.512.5 n=20:n = 20: Pr[Y