ME345_Lecture_13 - Solution Example Given A manufacturer...

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M E 345 Spring 2008 Professor John M. Cimbala Lecture 13 02/13/2008 Today, we will : Review the pdf module: Hypothesis Testing Do some example problems – hypothesis testing Example Given : A manufacturer claims that their pressure sensor will sound an alarm when the pressure exceeds 120 psi. 20 tests are performed in a tank, in which the pressure is slowly increased. The pressure at which the alarm sounds is recorded for each test. The results are: 121 0 psi x . = (sample mean – Note that we use x instead of P for convenience) S = 3.0 psi (sample standard deviation) To do : Should we accept the manufacturer’s claim?
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