HW4_SLN

# HW4_SLN - EMIS 7370/5370 & STAT 5340 Homework 4 Solution...

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Homework 4 Solution 18 samples of water is to be taken randomly from lake Dallas to evaluate pollution. Each sample of water has a 10% chance of containing a particular organic pollutant. Assume that the samples are independent with regard to the presence of the pollutant. (iii)Find the that exactly 2 samples contain the pollutant. (iv)Determine the probability that at least four samples contain the pollutant. (v) Determine the probability that at least three samples but less than seven contain the pollutant. (vi) What is the mean number of samples that contain the pollutant? (a) Pollutant

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Homework 4 Solution 16 2 ) 9 . 0 ( ) 1 . 0 ( 2 18 ) 2 ( = = X P 284 . 0 ) 9 . 0 ( ) 1 . 0 ( 153 16 2 = = (1) Find the that exactly 2 samples contain the pollutant. (2) Determine the probability that at least four samples contain the pollutant. = -
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## This note was uploaded on 10/06/2008 for the course EMIS 5370/7370 taught by Professor Dr.stracer during the Spring '08 term at SMU.

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HW4_SLN - EMIS 7370/5370 & STAT 5340 Homework 4 Solution...

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