What is the formula for estimating a common population variance based on the variance of the...
What is the formula for estimating a common population variance based on the variance of the following sample means:
59.1
65.1
67.1
59.7
61.5
I don't know what to do. I need step by step help, please.
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What is the formula for estimating a common population variance
based on the variance of the...
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a) Suppose we know the population variance σ2-400, there is a randorm sample with i-135, and the sample size is n the mean. I. 100. Please construction a 95% confidence interval for b) Suppose we do not know the population variance, and only know the sample variable s2-400, there is a random sample with -135, and the sample size is n-25. Please construct a 95% confidence interval for the mean.
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