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During a turbine airfoil manufacturing operation, rows of cooling holes are drilled by a laser. Suppose three different laser drilling machines are used to drill 30%, 45% and 25% of the airfoils, respectively. The airfoils are inspected for quality after the drilling operation by a flow bench, and if the measured flow rate does not fall within specification limits, it is rejected. Given past experience with these machines, the company has learned the percentages of airfoils that fail to pass inspection. The quality rejection rate from each machine is known to be 2%, 3% and 2%, respectively. Suppose a finished airfoil is selected randomly from a large batch from all three machines.
a) What is the probability that the airfoil will fail a flow inspection?
b) Determine the probabilities that a rejected airfoil is from each of the three machines?
c) Draw a tree diagram of the manufacturing and inspection process.
Based on the information above, estimate the mean and standard deviation of the weight of the pain killer in each bottle.
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.
When doing hypothesis testing we have two ways of making a decision - the critical value method and the p-value method. While both give the same results in terms of determining whether to reject or not reject the null hypothesis
What is the probability that fewer than 59 CEOs agree that it is attractive to have a joint venture to increase global competitiveness and what is the probability that between 53 and 61 (inclusive) CEOs agree with that assertion?
Assuming that X is a normal R.V. with mean 1000 and variance 2500, find the probability that a resistor picked at random will be rejected.
Using the following information for McDonovan, Inc.'s stock, calculate their expected return and standard deviation.
A population is Normally distributed and has a σ =24. Samples of size 25 have a sample mean of 100. Find the 90% confidence interval for the population mean.
What is the probability that the sample proportion will be within +/- .03 of the population proportion if a sample of size 1,200 is selected?
a randomly selected value from a normal distribution is found to be 2.1 standard deviations above its mean. what is the
five students ann betty clint douglas and edward are rated equaly qualified for admission to law school ahead of other
the length of time that a machine operates without failure is denoted by x and the length of time to repair a failure
the reply has to be 300-400 wordsa what are the characteristics of the standard normal distribution?b the hr
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