Question: In the EAI sampling problem (see Figure 7.8), we showed that for n =30, there was .5064 probability of obtaining a sample mean within

In the EAI sampling problem (see Figure 7.8), we showed that for n =30, there was .5064 probability of obtaining a sample mean within Â± $500 of the population mean.

a. What is the probability that is within $500 of the population mean if a sample of size 60 is used?

b. Answer part (a) for a sample of size 120.

Figure 7.8

Sampling distribution of T OF-730.30 P51,300 STS52,300) 51,300 51.800 52,300

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