An antipollution device for cars is claimed to have an average effectiveness of exactly 546. Based on
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An antipollution device for cars is claimed to have an average effectiveness of exactly 546.
Based on a test of 20 such devices you find that X¯ = 565.
Assuming normality and that σ = 40, would you rule out the claim with a Type I error probability of .05?
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Basic Statistics Understanding Conventional Methods And Modern Insights
ISBN: 9780195315103
1st Edition
Authors: Rand R. Wilcox
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