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Let 8 denote the average number of defects per ] 00 feet of a certain type of magnetic tape. Suppose that the value of 0 is unknown, and that the prior distribution of 8 is a gamma distribution with parameters a = 2 and fJ = 10. When a 1200-foot roll of this tape is inspected, exactly four defects are found. Determine the posterior distribution of 0.
What is the probability this student will receive 2 or more offers? (Round to 3 decimal places.)
This is a cold call on the warehouse manager for Coats Western Wear, a retailer with four stores.
Explain the difference between testing a single mean, testing the difference between two means from an "independent sample" and testing mean differences from a "dependent sample".
Compute the coefficient of determination, r 2 , and interpret its meaning.
Steroids A company has developed a drug test to detect steroid use by athletes. The test is accurate 95% of the time when an athlete has taken steroids.
Suppose you are a pollster and are planning to take a sample that is very small relative to the population. In terms of estimating a population mean.
3M (www.3m.com) manufactures 65,000 products, ranging from Scotch tape to fi lm for solar-energy panels to dental braces. It makes these products in 214 plants located in 41 countries. Over the years, 3M had developed long, complicated supply chai..
suppose x and y are independent. let x have the mean 3 and y have the mean 2. find the covariance of xy and
using the standard normal table find the proportions for the areas listed belowa. the area between z 0 and z 2.13b.
Test the claim that the proportion of Republican voters in a particular city is less than 40 percent. A random sample of 175 voters was selected and found to consist of 30 percent Republicans. Use α = 0.01 and determine the p-value for this sample..
a sample of 400 racing cars showed that 80 of them cost over 700000. what is the 99 confidence interval for the true
explain the general rationale behind using a z-score for describing how an individual performed on an exam compared to
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