Answer to Question #178228 in Statistics and Probability for Nimesh Jayamanne

Question #178228

In a random sample of 500 observations drawn from a normal population, the sample mean and sample standard deviation were calculated as X =350 and s = 100.

a) Estimate the population mean with 99% confidence.

b) Repeat part (a) assuming that you know that the population standard deviation is  = 100.

c) Explain why the interval estimates were virtually identical. 


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