Chapter 14 Interval Estimation / Confidence Intervals
We can take 1- confidence level = α . ex: so if we use the 95% level we get 1- 0.95 = α = 0.05. Rule: If we have σ known we can use the population variance to construct the sampling distributions variance as σ / , but many times we don’t know the population variance. In this case we can estimate the population variance with s, or the ... ................
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