In a large population of adults, the mean IQ is 116 with a standard deviation of 24. Suppose 50 adults are randomly selected for a market research campaign. (Round to 2 decimal places for all z-values and round all other answers to 4 decimal places, if needed.) (a) The distribution of IQ is approximately normal (b) The distribution of the sample mean IQ is approximately normal with a mean of and a standard deviation of (c) The probability that the sample mean IQ is less than 113 is (d) The probability that the sample mean IQ is greater than 113 is (e) The probability that the sample mean IQ is between 113 and 120 is

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