In the EAI sampling problem, the population mean is $71,200 and the population standard deviation is $4000. For n = 30, there is a 0.5878 probability of obtaining a sample mean within £$600 of the population mean. Use z-table. a. What is the probability that is within $600 of the population mean if a sample of size 60 is used (to 4 decimals)? b. Answer part (a) for a sample of size 120 (to 4 decimals).

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In the EAI sampling problem, the population mean is $71,200 and the population standard deviation is $4000. For n =
probability of obtaining a sample mean within +$600 of the population mean. Use z-table.
a. What is the probability that is within $600 of the population mean if a sample of size 60 is used (to 4 decimals)?
b. Answer part (a) for a sample of size 120 (to 4 decimals).
30, there is a 0.5878
Transcribed Image Text:In the EAI sampling problem, the population mean is $71,200 and the population standard deviation is $4000. For n = probability of obtaining a sample mean within +$600 of the population mean. Use z-table. a. What is the probability that is within $600 of the population mean if a sample of size 60 is used (to 4 decimals)? b. Answer part (a) for a sample of size 120 (to 4 decimals). 30, there is a 0.5878
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