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A Taguchi experiment is to be performed on the effects of lift, bore, stroke, and compression on engine performance with horsepower as the outcome variable. The factors were tested at each of the following levels in hopes of improving engine horsepower.
Lift (L) 2.75 2.90Bore (B) 0.10 0.30Stroke (S) 0.50 0.60Compression (C) 8.50 12.00
A multiple regression equation for list price of homes in certain community in USA is=170,000 -850 X 1 + 28,000 X 2 , where X 1 signifies age in years and X 2 signifies number of rooms.
Assume your statistics professor reports test grades as z-scores, and you got a score of 2.20 on the midterm exam. Write down a sentence explaining what that means.
Determine the probability of exactly one success given Poisson distribution with mean of 2.0.
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
What fraction of the calls last between 4.2 and 5 minutes?
Find out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results.
Use PHStat to make a box-whisker plot. If PHSTAT has yet to be installed, calculate Xmin, Xmax, Q 1 , Q 3 and median using equation in Class Notes-Quartiles, Percentile & Dectiles.
Jolly Blue Giant Health Insurance is concerned about rising lab test costs and would like to know. Determine the essential sample size?
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
Significance level to test the claim that less than half (.5) of all executives identify that error as being the most common job interviewing error.
Of the adults in Jefferson County, 10% have had CPR training
Find the probability that 665 or fewer college students in the sample send and receive text messages with their phones? Is this result unusual?
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