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dPrint Hide email 1) The incomes in a certain large population of high school teachers has a mean income μ-$70,000 and standard deviation σ-S6, 000. 50 teachers are selected at random from this population for a survey a) (5 pts) Based on the central limit theorem we would expect the distribution of the sample mean incomes to be approximately b) (5 pts) What is the mean of the sampling distribution of the mean (x )? c) (5 pts) What is the standard deviation of the sampling distribution of the mean ( )? (1 decimal place) d) (10 pts) What is the probability that the average salary of the 50 teachers is more than $72,000? (4 decimal places)

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Answer #1

m large enougAs ue Standar Normal Co-o = 848.5 (c) 사dndare deu ithm 스엌2000 可--可

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