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Q1) Supplier quotes a Cp value of 1.7. After discussion with representatives, you find out that they are computing standard deviation as you wish, buy you are concerned that they had sample size of only 20. Find out a 95% confidence level for population Cp.
Q2) Tensile strength of metal part is normally distributed with mean 40LB and standard deviation 5LB. If 50,000 parts are produced, how many would you expect to fail to meet minimum specification limit of 35LB tensile strength? How many would have tensile strength in excess of 48LB?
Q3) A mechatronic assembly is subjected to final functional test. Assume that defects happen at random in these assemblies and which defects occur according to Poisson distribution with parameter λ = 0.02
i) Determine the probability that assembly will have exactly one defect?
ii) Determine the probability that an assembly will have one or more defects?
iii) Assume that you improve process so that occurrence rate of defects is cut in half to λ = 0.01. What effect does this have on probability that assembly will have one or more defects?
Evaluate 2-month moving average and Exponential smoothing by MAD.
At α = .05, is there a difference in variances? Illustrate all steps clearly, including the illustration of the decision rule.
Carry out a test of hypothesis on each of regression coefficients. Could you delete any of the variables?
Compute the probability that student eats at fast food restaurant 2 or more times per week?
At a large department store, the amount a shopper spent and the shopper's gender (male or female) were recorded. To determine if gender is useful in explaining the amount of money a shopper spends at the store we could
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. The null hypothesis of equality of means is rejected. What conclusion can be made f..
Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb
Consumer Review posts reviews and ratings of a variety of products on internet. The following is a sample of 20 speaker systems and their ratings (www.audioreviews.com).
Utilize a test of the difference among proportions when answering these questions. Illustrate the research hypothesis.
Estimating the value of the population mean on the basis of the sample mean alone produces a(n):
Either no change to the Objective function or a raise in the value of the objective function depends on the constraint.
Find a 90% confidence interval for the population mean weight of all such turtles.
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