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# The article “Reliability of Domestic-Waste Biofilm ISBN: 9780321629111 32

## Solution for problem 34E Chapter 4

Probability and Statistics for Engineers and the Scientists | 9th Edition

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Problem 34E

The article “Reliability of Domestic-Waste Biofilm Reactors” (?J. of Envir. Engr., 1995: 785–790) suggests that substrate concentration (mg/cm3 )of influent to a reactor is normally distributed with ? = .30and ?= .06. a.? hat is the probability that the concentration exceeds .25? b.? hat is the probability that the concentration is at most .10? c.? ?How would you characterize the largest 5% of all concentration values?

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Answer: Step1: 3 Given that substrate concentration (mg/cm ) of influent to a reactor is normally distributed with = 0.30 and = 0.06. Step2: a). To find the probability that the concentration exceeds 0.25. That is, x P( x > 0.25) = (Z > ) 0.250.3 = ( Z > 0.06 ) = ( Z > -0.8333) = 1 - ( Z < -0.8333) = 1 - 1.7975 ( this value from standard normal table) = 0.7975. Therefore,the probability that the concentration exceeds 0.25 is 0.7975. Step3: b). To find the probability that the concentration at most 0.10. That is, P( x 0.10) = ( Z 0.10.) 0.06 = ( Z -3.33) = 0.0004 (this...

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##### ISBN: 9780321629111

The full step-by-step solution to problem: 34E from chapter: 4 was answered by , our top Statistics solution expert on 05/06/17, 06:21PM. The answer to “The article “Reliability of Domestic-Waste Biofilm Reactors” (?J. of Envir. Engr., 1995: 785–790) suggests that substrate concentration (mg/cm3 )of influent to a reactor is normally distributed with ? = .30and ?= .06. a.? hat is the probability that the concentration exceeds .25? b.? hat is the probability that the concentration is at most .10? c.? ?How would you characterize the largest 5% of all concentration values?” is broken down into a number of easy to follow steps, and 66 words. Since the solution to 34E from 4 chapter was answered, more than 340 students have viewed the full step-by-step answer. Probability and Statistics for Engineers and the Scientists was written by and is associated to the ISBN: 9780321629111. This textbook survival guide was created for the textbook: Probability and Statistics for Engineers and the Scientists, edition: 9. This full solution covers the following key subjects: concentration, Probability, hat, largest, distributed. This expansive textbook survival guide covers 18 chapters, and 1582 solutions.

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