The pH water samples from a specific lake is a random variable X with probability density function. (7- x)?, 5

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
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The pH water samples from a specific lake is a random variable X with probability density
function.
f(x) = {8
(7– x)²,
5 < x<7
0,
elsewhere
a. ) Find E(X) ( expected value or mean)
b. ) Find V(X) ( Variance)
Transcribed Image Text:The pH water samples from a specific lake is a random variable X with probability density function. f(x) = {8 (7– x)², 5 < x<7 0, elsewhere a. ) Find E(X) ( expected value or mean) b. ) Find V(X) ( Variance)
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