A taxi company in a large city put a new type of tire with a special tread

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A taxi company in a large city put a new type of tire with a special tread on a random sample of 50 cars, and the regular type of tire on another random sample of 50 cars. After a month, the gas mileage of each car was measured.

a. Is this a randomized experiment or an observational study?

b. Assume that one of the samples had noticeably better gas mileage than the other. Could this result be due to confounding? Explain.

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Elementary Statistics

ISBN: 9781259969454

3rd Edition

Authors: William Navidi, Barry Monk

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Question Posted: Apr 30, 2024 08:54 AM

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A taxi company in a large city put a new type of tire with a special tread

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a This is a randomized experiment In a randomized experiment the researcher manipulates the conditio...View the full answer

Elementary Statistics

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