HWK 2 - 1) 2) 3) BFDA Newmanufacturingproductionmethod

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BFDA  1) New manufacturing production method 2) Is the mean cost of the new production method less than $230 per hour? 3) 40 hours of the new method will be examined and the standard deviation is $10 And the old method has a mean of $220 St. Dev. = 1.58 4.74 4) First the null and alternative hypotheses need to be determined. Then the 40 hours of the new method will need to be examined to  determine if the new method has an average mean of less than $220 Hypothesis: Test Stat: 1) calculate x-bar 2) If Ho true (mu=220),  the sampling distribution is: Normal ( 220, 10/40^.5,0)  Sig. Level: Alpha = .05 Reject Ho: Reject Ho: if x-bar <  217 Norminv: 217 x-bar value: Prob. Fctn 215 0 216 0.01 217 0.04 218 0.11 219 0.21
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This note was uploaded on 03/31/2011 for the course STATS 211 taught by Professor Dunne during the Spring '07 term at University of Dayton.

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