A researcher claims that she can reduce the variance of N(,100) by a new manufacturing process. If
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(a) If n = 23, S2 = 32.52, and α = 0.025, would she reject H0?
(b) Based on the same distributional result, what would be a reasonable test of H0: σ2 = 100 against a two sided alternative hypothesis H1: σ2 ≠ 100 when α = 0.05?
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Related Book For
Probability and Statistical Inference
ISBN: 978-0321923271
9th edition
Authors: Robert V. Hogg, Elliot Tanis, Dale Zimmerman
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