- A Manufacturing Process Produces Parts With A Lifetime That Can Be Modeled As A Random Variable With Mean 1230 Hours And 1 (55.27 KiB) Viewed 34 times
A manufacturing process produces parts with a lifetime that can be modeled as a random variable with mean 1230 hours and
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A manufacturing process produces parts with a lifetime that can be modeled as a random variable with mean 1230 hours and
A manufacturing process produces parts with a lifetime that can be modeled as a random variable with mean 1230 hours and standard deviation 100 hours. After a redesign of the manufacturing process, the lifetime of 50 parts is measured and averaged. An average lifetime of 1255 is obtained for the sample. Describe how you would test the hypothesis that the redesign caused an increase in the average lifetime by answering the following questions: (a) State the null and alternate hypotheses. OHO: Yx=1230 hours. H1: Ux> 1230 hours. OHO: x=1230 hours. Hi: x < 1230 hours. OHO: Px=1230 hours. Hi: x # 1230 hours. Submit Answer Tries 0/1 (b) Find the Z-score for the sample mean. Give at least 3 digits past the decimal point. Submit Answer Tries 0/2 (c) Do you accept or reject the claim at a level of significance a = 0.05? Accept Ho, reject Hi. Reject Ho, accept H1. Submit Answer Tries 0/1
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