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In the EAI sampling problem, the population mean is $51,200 and the population standard deviation is...

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Basic Math

In the EAI sampling problem, the population mean is $51,200 andthe population standard deviation is $5,000. When the sample sizeis n=30, there is a 0.4908 probability of obtaining a sample meanwithin plus or minus $600 of the population mean. Usez-table.

a. What is the probability that the sample meanis within $600 of the population mean if a sample of size 60 isused (to 4 decimals)?

b. What is the probability that the sample meanis within $600 of the population mean if a sample of size 120 isused (to 4 decimals)?

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SolutionGiventhe population mean andthe population standard deviation when sample size n 30 the probability of obtaining asample mean within    See Answer
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