An antipollution device for cars is claimed to have an, Basic Statistics

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An antipollution device for cars is claimed to have an

1. 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.

2. 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: An antipollution device for cars is claimed to have an

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Basic Statistics: An antipollution device for cars is claimed to have an

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