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Unformatted text preview: found to be acceptable? Hint: First find such that . Then calculate . * 2 x 99 . ] * 2 x 2 X  2 1 X [ P = = &gt; ] * 2 x 2 X [ P = Problem 2 (40 Points) The strength X of a concrete batch has normal distribution where is known ( =1000 psi (pounds per square inch)) but m is uncertain with normal distribution . To better constrain m, you test 4 concrete cylinders in the lab from which you obtain the sample average ) 2 , m ( N ~ X ) 2 ) psi 800 ( , psi 5000 ( N ~ m = 4 i i X 4 1 X . Notice that X has distribution ) 2 4 , m ( N ~ X and that it can be thought of as a noisy measurement of m, + = m X , where ) 2 4 , ( N ~ . Suppose that you measure psi 6000 X = . Find the mean value and variance of ) psi 6000 X  m ( = ....
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This note was uploaded on 11/29/2011 for the course CIVIL 1.00 taught by Professor Georgekocur during the Spring '05 term at MIT.
 Spring '05
 GeorgeKocur

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