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A quality-assurance inspector periodically examines the output of a machine to determine whether it is properly adjusted. When set properly, the machine produces nails having a mean length of 2.000 inches, with a standard deviation of 0.070 inches.
For a sample of 35 nails, the mean length is 2.025 inches. Using the 0.01 level of significance, examine the null hypothesis that the machine is adjusted properly. Determine and interpret the p-value for the test.
a) Define the decision variables? How many decision variables are there in total? b) What is the objective function? c) What are the constraints including the sign and type restrictions?
What is the F critical value to be used at the 0.05 level of significance with 7 numerator degrees of freedom and 12 denominator degrees of freedom?
The regional tupperware dealers earned these commissions last month: what was the mean commision earned? round your answers to the nearest cents.
A manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. At the end of December, the company wishes to forecast sales for January.
Teach for America - Several programs attempt to address the shortage of qualified teachers by placing uncertified instructors in schools with acute needs-often inner cities. A 1999-2000 study compared students taught by certified teachers with oth..
Use the marginal probabilities of school quality, school cost or convenience, and other to comment on the most important reason for choosing a school.
find the z-scores that separate the middle 71 of the distribution from the area in the tails of the standard normal
the following data represents the mean august temperature fahrenheit in 20 us cities 64 64 68 69 70 71 71 72 74
The president of the United States is thought to have a positive approval rating of 58% of the people at a certain time. In a random sample of 1200 people, what is the approximate probability that the number of positive approvals will be at least ..
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states.
how is a discrete variable different from a continuous variable? give one example of each and describe how these
What is an independent sample? What is a related sample? When should researchers use different hypothesis tests for independent and related samples?
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