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This needs to be done in Excel
50 students enrolled in a particular course recently completed a mid-term exam. 13 students earned an A, 10 students earned a B, 8 students earned a C, 9 students earned a D, and 10 students earned an F on the exam. The students were queried regarding the number of hours they had devoted to studying for the exam. 11 of the students who earned an A, 7 of the students who earned a B, 3 of the students who earned a C, 2 of the students who earned a D, and 1 of the students who earned an F reported that they had devoted more than 8 hours to studying for the exam. The remaining students reported that they had devoted no more than 8 hours to studying for the exam.
A regression equation was computed to be Y= = 35 + 6X. The value of the 35 indicates that:
Explain why those rates may be more meaningful as a measure of change across time than the actual numbers of those events.
When is it valid to use a one-tailed test? What is the advantage of a one-tailed test? Give an example of a null hypothesis that would be tested by a one-tailed test.
a paticle starts at 00 and moves in one-unit independed steps with equal probabilites of 14 in each of the four
Visits to Web sites. What kinds of Web sites do males aged 18 to 34 visit most often? Pornographic sites take first place, but about 50 percent of male Internet users in this age group visit an auction site such as eBay at least once a month. Inte..
out of a total of 10 college textbooks estimate the standard deviation of their ages if the oldest textbook is known
Recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
Where should the warranty limits be set so that only 10% of the TVs need repairs at the manufacturer's expense?
In the past, Bly has tended to estimate warranty expenses on the high end to be conservative. He must work with the dealership's accountant at year-end to arrive at the warranty expense accrual for cars sold each year.
Twenty times they sold 6 cars, they never sold 7 cars, three times they sold 8 cars and one time they sold 9 cars. Find the probability that at most 4 cars were sold in a week.
the value of the test statistic for testing if one population mean is larger than the other based on samples of size 24
260 of them were manufactured by Asian automobile companies. Find the 95% confidence interval for this city's population proportion of vehicles made by Asian companies.
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