If X over = 90, σ = 11, and n = 63, construct a 95% confidence interval estimate of the population mean, μ.
i'm not looking for just the answer. If someone could help with the formula and steps so I can understand how to do it.
Solution:- Given that X over = 90, σ = 11, and n = 63
95% confidence interval for the Z = 1.96
95% confidence interval for the population mean = X +/- Z*σ/sqrt(n)
= 90 +/- 1.96*11/sqrt(63)
= 87.2836 , 92.7163
If X(mean) = 68 If σ = 11, and n = 67, construct a 95% confidence interval estimate of the population mean, μ.
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