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What is the probability that the obtained sample mean

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Reference no: EM132846573

Suppose a sample of size 40 from a normal population with population variance 4 is used to estimate the unknown population mean.

(a) What is the probability that the obtained sample mean for a randomly selected sample will be within i0.1 of the population mean?

(b) What sample size should be used to guarantee that with probability 95% the sample mean of a random sample will be within i0.1 of the population mean?

Reference no: EM132846573

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