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The Rhetoric Department offers the popular course "Statistically Speaking" two times ayear. Students seem to like the course, both because it teaches them to integrate quantita-tive analyses into their argumentation, and because it is an easy A. The final (and only)exam in the course is a fifty-question multiple-choice test. If rhetoric major Rhett Butler knew the answer to forty of the questions, and selected an answer at random (from among five possible answers) for the remaining ten questions, what is the probability thathe actually knew the answer to a particular question that he got right?
A researchers wish to estimate, with 95% confidence, the proportion of people who own a home computer. A previous study shows the 40% of those interviewed had a computer at home.
A researcher hypothesizes that people who listen to classical music have higher concentration skills than those in the general population. On a standard concentration test, the overall mean is 15.5. The researcher gave this same test to a random samp..
There are four entrances to the Government Center Building in downtown Philadelphia.The building maintenance supervisor would like to know if the entrances are equally utilized.
In a market study for Target, a researcher found that 70% of customers are repeat customers. If 14 customers are selected at random, find the probability of getting.
Use of linear regression is a critical tool for a managers decision-making ability - Using a level of significance of .01, is there evidence that the out of state students may be receiving lower grades? Fully explain your answer.
Test hypothesis that people in State A are more depressed than U.S. population. Illustrate all of your hypothesis steps. (Use alpha = .01.)
How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if you are only given the solution? Is it possible to have different quadratic equations with the same solution? Explain.
The board of directors of Saner Automatic Door Company consists of 12 members, 3 of whom are women.
Draw a normal probability plot for residuals using excel or Minitab. Do the residuals seem normally distributed? If yes, why?
Utilize this information to construct a probability table, and then calculate each of the given probabilities:P (female and domestic car).
a statistician selected a sample of 16 accounts receivable and determined the mean of the sample to be 5000 with a
From the fourth quarter of 1997 to the first quarter of 1998, revenues declined. What happened on a seasonally adjusted basis? d)Compute the forecast for the second quarter of 2002. e)Find the regression equation to predict the long term trend in th..
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