Would you rule out the claim with a type i error probability

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Reference no: EM131398789

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. Assuming normality and that σ = 40, would you rule out the claim with a Type I error probability of .05?

2. Comment on the relative merits of using a .95 confidence interval for addressing the effectiveness of the antipollution device in Exercise.

Exercise
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?

Reference no: EM131398789

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