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A sample is selected from a normal population with a µ = 40 and σ =...

A sample is selected from a normal population with a µ = 40 and σ = 12. After the treatment is administered to the sample, the sample mean is found to be M = 46. Using two-tailed Z-tests (with p < .05): A) Is there a significant treatment effect if the sample size was n = 4? B) If n = 36? C) What are the 95% confidence intervals for these two situations?

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c1)

c2)

orchestra answered 1 year ago
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