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Four wheel bearings are to be replaced on a company vehicle, and the mechanic has selected the four replacement parts from a large supply bin. Unknown to the mechanic, 10% of the bearings are defective and will fail within the first 100 miles after installation.
What is the probability that the company vehicle will have a breakdown due to defective wheel bearings before it completes tomorrow's 200-mile delivery route?
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
7 squirrels were found to have an average weight of 9.4 ounces with a sample standard deviation is 0.9. find the 95
The Rathburn Manufacturing Company makes electric wiring, which it sells to contractors in the construction industry. Approximately 900 electric contractors purchase wire from Rathburn annually.
Below we have comparative boxplots and overlayed normal probability plots for the salivary flow rate. Is it reasonable to assume that the populations are normal? Do we have significant evidence at a = 5% that the mean salivary flow rate are different..
Is the hypothesized difference (0.00) within the interval? Given the presence or absence of the 0.00 value within the interval, is this consistent with the findings of the hypothesis test?
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. What is the value of your test statistic.
an article contained the following observations on degree of polymerization for paper specimens for which viscosity
the distribution of the amount of money in savings accounts for university of miami students has an average of 1100
a hospital administrator wants to measure average time per hip replacement procedure performed in the institutions
What is your estimate of the standard deviation of the waiting time for a customer? Construct a moving-average control chart using a span of 3. What conclusions can you draw from the chart?
The time in hours required for 40 individuals to complete their federal income tax returns. Using past years' data, the population standard deviation can be assumed known with σ=9 hours.
Three families, each with three members, are lined up at random for a picture. What is the probability that members of each family happen to be together (that is, not separated by someone from another family) in the picture?
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