A 90%confidence interval for the population mean time (in minutes) needed to finish a certain assembly process

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A 90%confidence interval for the population mean time (in minutes) needed to finish a certain assembly process is 90 < μ_x < 130.

(a) Sketch this interval, indicating the margin for sampling error.

(b) If the sample size was n ¼ 25, what was the sample standard deviation?

(c) To interpret this confidence interval, what did you have to assume about the population? Why?

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Statistics For Business And Financial Economics

ISBN: 9781461458975

3rd Edition

Authors: Cheng Few Lee , John C Lee , Alice C Lee

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Question Posted: Feb 17, 2024 11:37 PM

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A 90%confidence interval for the population mean time (in minutes) needed to finish a certain assembly process

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a Sketching the interval with the margin for sampling error So the sketch of the interval would look ...View the full answer

Statistics For Business And Financial Economics

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