If you wish to estimate a population mean with a sampling distribution error SE = 0.33 using a 95% confidence interval and you know from prior sampling that σ^2 is approximately equal to 7.9, how many observations would have to be included in your sample?
Added by Christina H.
Step 1
We know that the sampling distribution error (SE) is 0.33 and we want to use a 95% confidence interval. This means that we need to find the critical value for a 95% confidence interval, which is 1.96 (from a standard normal distribution table). Show more…
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