8. A company claims that rechargeable batteries it produces can last at least 50,000 hours. A randomly selected 40 batteries had a mean of 49,000 hours. It is assumed that the battery life is normally distributed with a standard deviation of 5,800 hours. Conduct an appropriate hypothesis test using the critical value approach, at the 0.05 level of significance. Is there evidence that the mean battery life as claimed by the company is true?

8. A company claims that rechargeable batteries it produces can last at least 50,000 hours. A randomly selected 40 batteries had a mean of 49,000 hours. It is assumed that the battery life is normally distributed with a standard deviation of 5,800 hours. Conduct an appropriate hypothesis test using the critical value approach, at the 0.05 level of significance. Is there evidence that the mean battery life as claimed by the company is true?

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter13: Probability And Calculus

Section13.2: Expected Value And Variance Of Continuous Random Variables

Problem 10E

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