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Suppose that a device advertised to increase a car's gas mileage really does not work. We test it ...

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Suppose that a device advertised to increase a car's gas mileage really does not work. We test it ...

Suppose that a device advertised to increase a car's gas mileage really does not work. We test it on a small fleet of cars (with H₀: not effective), and our data results in a P-value of 0.004. What probably happens as a result of our experiment?

▸ We fail to reject H₀, committing a Type II error.

▸ We correctly fail to reject H₀.

▸ We reject H₀, making a Type I error.

▸ We reject H₀, making a Type II error.

▸ We correctly reject H₀.

Textbook

Stats: Modeling the World

Edition: 4^th

Authors: Bock, Velleman, De Veaux

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