Explanation Given: The probability density function of a continuous random variable X on the interval [ 1 , e ] is f ( x ) = a x + b x and E ( X ) = 2 . Formula used: “Suppose the function f defined on the interval [ a , b ] is the probability density function associated with a continuous random variable X . Then the expected value of X is E ( X ) = ∫ a b x f ( x ) d x ”. “A probability density function of a random variable X in an interval I , where I may be bounded or unbounded is a nonnegative function f having the following property. The total area of the region under the graph of f is equal to 1. That is ∫ a b f ( x ) d x = 1 ” Calculation: Obtain the value of E ( X ) for the given function f by using the expected value formula. E ( X ) = ∫ 1 e x ( a x + b x ) d x = ∫ 1 e ( a x 2 + b ) d x = [ a x 3 3 + b x ] 1 e = [ a ( e ) 3 3 + b ( e ) − ( a ( 1 ) 3 3 + b ( 1 ) ) ] On further simplification, E ( X ) = a ( e ) 3 3 + b ( e ) − a 3 − b From the given, E ( X ) = 2 . Substitute E ( X ) = 2 in E ( X ) = a ( e 3 − 1 ) 3 + b ( e − 1 ) , 2 = a ( e 3 − 1 ) + 3 b ( e − 1 ) 3 a ( e 3 − 1 ) + b ( 3 e − 3 ) = 6 (1) Integrate f with respect to x and the limits from 1 to e , ∫ 1 e ( a x + b x ) d x = [ a x 2 2 + b ( ln x ) ] 1 e = [ a ( e ) 2 2 + b ( ln e ) − ( a ( 1 ) 2 2 + b ( ln 1 ) ) ] = a ( e ) 2 2 + b ( 1 ) − a 2 − 0 = a ( e 2 2 − 1 2 ) + b ( 1 ) On further simplification, a ( e 2 2 − 1 2 ) + b = a ( e 2 − 1 2 ) + b = a ( e 2 − 1 ) + 2 b 2 Since the given f is a probability density function, the total area of the region under the graph of f is equal to 1. That is, ∫ 1 e ( a x + b x ) d x = 1 . The value of the integral ∫ 1 e ( a x + b x ) d x is a ( e 2 − 1 ) + 2 b 2

Applied Calculus for the Managerial, Life, and Social Sciences (MindTap Course List)

10th Edition

ISBN: 9781305657861

Author: Soo T. Tan

Publisher: Cengage Learning

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Chapter 10.2, Problem 26E

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To find: The values of a and b.

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Chapter 10.2, Problem 25E

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Chapter 10 Solutions

Applied Calculus for the Managerial, Life, and Social Sciences (MindTap Course List)

Ch. 10.1 - Define the following terms in your own words: a....Ch. 10.1 - Prob. 2CQ Ch. 10.1 - Prob. 3CQ Ch. 10.1 - Prob. 1E Ch. 10.1 - Prob. 2E Ch. 10.1 - Prob. 3E Ch. 10.1 - Prob. 4E Ch. 10.1 - Prob. 5E Ch. 10.1 - Prob. 6E Ch. 10.1 - Prob. 7E

Ch. 10.1 - Prob. 8E Ch. 10.1 - Prob. 9E Ch. 10.1 - Prob. 10E Ch. 10.1 - Prob. 11E Ch. 10.1 - Prob. 12E Ch. 10.1 - Prob. 13E Ch. 10.1 - Prob. 14E Ch. 10.1 - Prob. 15E Ch. 10.1 - Prob. 16E Ch. 10.1 - Prob. 17E Ch. 10.1 - Prob. 18E Ch. 10.1 - Prob. 19E Ch. 10.1 - Prob. 20E Ch. 10.1 - Prob. 21E Ch. 10.1 - Prob. 22E Ch. 10.1 - Prob. 23E Ch. 10.1 - Prob. 24E Ch. 10.1 - Prob. 25E Ch. 10.1 - Prob. 26E Ch. 10.1 - Prob. 27E Ch. 10.1 - Prob. 28E Ch. 10.1 - Prob. 29E Ch. 10.1 - Prob. 30E Ch. 10.1 - Prob. 31E Ch. 10.1 - Prob. 32E Ch. 10.1 - Prob. 33E Ch. 10.1 - Prob. 34E Ch. 10.1 - Prob. 35E Ch. 10.1 - Prob. 36E Ch. 10.1 - Prob. 37E Ch. 10.1 - Prob. 38E Ch. 10.1 - Prob. 39E Ch. 10.1 - Prob. 40E Ch. 10.1 - Prob. 41E Ch. 10.1 - Prob. 42E Ch. 10.1 - Prob. 43E Ch. 10.1 - FREQUENCY OF ROAD REPAIRS The fraction of streets...Ch. 10.1 - Prob. 45E Ch. 10.1 - Prob. 46E Ch. 10.1 - Prob. 47E Ch. 10.1 - RELIABILITY OF MICROPROCESSORS The microprocessors...Ch. 10.1 - Prob. 49E Ch. 10.1 - Prob. 50E Ch. 10.1 - Prob. 51E Ch. 10.1 - Prob. 52E Ch. 10.1 - Prob. 53E Ch. 10.1 - Prob. 54E Ch. 10.1 - Prob. 55E Ch. 10.1 - Prob. 57E Ch. 10.1 - Prob. 58E Ch. 10.1 - PRODUCT RELIABILITY Hal has a tablet PC and a...Ch. 10.1 - Prob. 60E Ch. 10.1 - Prob. 61E Ch. 10.1 - Prob. 62E Ch. 10.1 - Prob. 63E Ch. 10.1 - Prob. 64E Ch. 10.1 - Prob. 65E Ch. 10.1 - Prob. 66E Ch. 10.1 - Prob. 1TE Ch. 10.1 - Prob. 2TE Ch. 10.1 - Prob. 3TE Ch. 10.1 - Prob. 4TE Ch. 10.2 - Prob. 1CQ Ch. 10.2 - Prob. 2CQ Ch. 10.2 - Prob. 3CQ Ch. 10.2 - In Exercises 114, find the mean, variance, and...Ch. 10.2 - Prob. 2E Ch. 10.2 - Prob. 3E Ch. 10.2 - Prob. 4E Ch. 10.2 - Prob. 5E Ch. 10.2 - Prob. 6E Ch. 10.2 - Prob. 7E Ch. 10.2 - Prob. 8E Ch. 10.2 - Prob. 9E Ch. 10.2 - Prob. 10E Ch. 10.2 - Prob. 11E Ch. 10.2 - Prob. 12E Ch. 10.2 - Prob. 13E Ch. 10.2 - Prob. 14E Ch. 10.2 - Prob. 15E Ch. 10.2 - PROBABILITY OF RAINFALL The amount of rainfall (in...Ch. 10.2 - Prob. 17E Ch. 10.2 - Prob. 18E Ch. 10.2 - Prob. 19E Ch. 10.2 - Prob. 20E Ch. 10.2 - Prob. 21E Ch. 10.2 - Prob. 22E Ch. 10.2 - Prob. 23E Ch. 10.2 - Prob. 24E Ch. 10.2 - Prob. 25E Ch. 10.2 - Prob. 26E Ch. 10.2 - Prob. 27E Ch. 10.2 - Prob. 28E Ch. 10.2 - Prob. 29E Ch. 10.2 - Prob. 30E Ch. 10.2 - Prob. 31E Ch. 10.2 - Prob. 32E Ch. 10.2 - Prob. 33E Ch. 10.2 - Prob. 34E Ch. 10.2 - Prob. 35E Ch. 10.2 - Prob. 36E Ch. 10.2 - Prob. 1TE Ch. 10.2 - Prob. 2TE Ch. 10.2 - Prob. 3TE Ch. 10.2 - Prob. 4TE Ch. 10.2 - Prob. 5TE Ch. 10.2 - Prob. 6TE Ch. 10.3 - Prob. 1CQ Ch. 10.3 - Prob. 2CQ Ch. 10.3 - Prob. 1E Ch. 10.3 - Prob. 2E Ch. 10.3 - Prob. 3E Ch. 10.3 - Prob. 4E Ch. 10.3 - Prob. 5E Ch. 10.3 - Prob. 6E Ch. 10.3 - Prob. 7E Ch. 10.3 - Prob. 8E Ch. 10.3 - Prob. 9E Ch. 10.3 - Prob. 10E Ch. 10.3 - Prob. 11E Ch. 10.3 - Prob. 12E Ch. 10.3 - Prob. 13E Ch. 10.3 - Prob. 14E Ch. 10.3 - Prob. 15E Ch. 10.3 - Prob. 16E Ch. 10.3 - Prob. 17E Ch. 10.3 - Prob. 18E Ch. 10.3 - Prob. 19E Ch. 10.3 - Prob. 20E Ch. 10.3 - Prob. 21E Ch. 10.3 - FACTORY WORKERS WAGES According to the data...Ch. 10.3 - Prob. 23E Ch. 10.3 - Bottling Jam The weights of jam bottled by Snyder ...Ch. 10.3 - Prob. 25E Ch. 10.3 - Prob. 26E Ch. 10.3 - Prob. 27E Ch. 10.3 - Prob. 28E Ch. 10.3 - Prob. 29E Ch. 10.3 - Prob. 30E Ch. 10.3 - Prob. 31E Ch. 10.3 - Prob. 32E Ch. 10.3 - Prob. 33E Ch. 10.3 - Prob. 34E Ch. 10 - Fill in the blanks. a. An activity with observable...Ch. 10 - Prob. 2CRQ Ch. 10 - Prob. 3CRQ Ch. 10 - Prob. 4CRQ Ch. 10 - Prob. 5CRQ Ch. 10 - Prob. 6CRQ Ch. 10 - Prob. 7CRQ Ch. 10 - Prob. 8CRQ Ch. 10 - Prob. 1RE Ch. 10 - Prob. 2RE Ch. 10 - Prob. 3RE Ch. 10 - Prob. 4RE Ch. 10 - Prob. 5RE Ch. 10 - Prob. 6RE Ch. 10 - Prob. 7RE Ch. 10 - Prob. 8RE Ch. 10 - Prob. 9RE Ch. 10 - Prob. 10RE Ch. 10 - Prob. 11RE Ch. 10 - Prob. 12RE Ch. 10 - Prob. 13RE Ch. 10 - Prob. 14RE Ch. 10 - Prob. 15RE Ch. 10 - Prob. 16RE Ch. 10 - Prob. 17RE Ch. 10 - Prob. 18RE Ch. 10 - Prob. 19RE Ch. 10 - Prob. 20RE Ch. 10 - Prob. 21RE Ch. 10 - Prob. 22RE Ch. 10 - Prob. 23RE Ch. 10 - Prob. 24RE Ch. 10 - Prob. 25RE Ch. 10 - Prob. 26RE Ch. 10 - Prob. 27RE Ch. 10 - Prob. 28RE Ch. 10 - Prob. 29RE Ch. 10 - Prob. 30RE Ch. 10 - Prob. 1BM Ch. 10 - Prob. 2BM Ch. 10 - Prob. 3BM Ch. 10 - Prob. 4BM

Knowledge Booster

The values of a and b .

Solution Summary: The author explains the probability density function of a continuous random variable X on the interval left[1,eright].

To find: The values of a and b.

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Chapter 10 Solutions