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Author Question: What proportion of the time will it take the clean-up crew 93.0 or more hours to clean the ... (Read 124 times)

ghost!

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on: Jul 24, 2018
What proportion of the time will it take the clean-up crew 93.0 or more hours to clean the plant?

Question 2

If we assume nothing about the shape of distribution, approximately what percentage of all such tires will last between 42,500 and 57,500 miles?


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DHRUVSHAH

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Reply #1 on: Jul 24, 2018
Answer to Question 1

z = (93 -80) / 6.5 = 2 . Therefore, 93.0 is 2 standard deviations above the mean. Hence, 2.5 of the time more than 93.0 hours will be required.

Answer to Question 2

According to Chebyshev's Theorem, at least 89 of all such tires will last between 42,500 and 57,500 miles (i.e., within three standard deviations of the mean).


ghost!

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Reply 2 on: Jul 24, 2018
YES! Correct, THANKS for helping me on my review

skipfourms123

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Reply 3 on: Yesterday
Excellent

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