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QUESTION
We take a simple random sample of size 50 from a population with unknown variance. We find the sample mean is x= 25 and the sample standard deviation...
.We take a simple random sample of size 50 from a population with unknown variance. We find the sample mean is ̄x= 25 and the sample standard deviation is s = 15.
(a) Give the 90% confidence interval for the population mean μ .
(b) Give the 95% confidence interval for the population mean μ .
(c) Give the 99% confidence interval for the population mean μ .
