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Assignment07_OROUR

# Assignment07_OROUR - 8.30 xbar=1.6 s=13.3 n=240 =.01 H0=0...

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8.30 Point spreads of NFL games  x-bar = -1.6 s = 13.3 n = 240 α =.01 H 0  =  µ  = 0 H a  =  µ    0 z = x-bar -  µ  / s/ n z = -1.907 H 0  is confirmed as the calculated z score value falls within the acceptance range of  ± 2.575, and  the probability of observing  a value z < -2.575 or z > 2.575 is   = .01. α 8.32 Solder joint inspections a) µ  = 10 x-bar = 9.292 s = 2.103 n = 48 α  = .05 H 0  =  µ  = 10 H a  =  µ    10 b) A Type I error for this exercise is if it is assumed that H a  , that manufacturer’s claim of 10  solder joint inspections per second, is false, but when calculated H 0 , the manufacturer’s claim, is  found to be true. This is due to the probability   being incorrect. A Type II error for this exercise α   is if it is assumed that H 0  is true, but when calculated H a  is found to be true. The likely cause is  probability  . β

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