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On the basis of data provided by a Romac salary survey, the variance in annual salaries forseniors in public accounting firms is approximately 2.1 and the variance in annual salaries for managers in public accounting firms is approximately 11.1. The salary data wereprovided in thousands of dollars. Assuming that the salary data were based on samplesof 25 seniors and 26 managers, test the hypothesis that the population variances in thesalaries are equal. At a .05 level of significance, what is your conclusion?
Richwood Products buys parts from Staple Brothers machining. The engineers at Richwood want to ensure that the parts purchased meet their company's standards.
If the sum of squares total is 800 and the sum of squares error is 170. What is the r-squared value?
a suppose that we wish to test the hypotheses h0 p 0.12 versus ha p lt0.12. if the test statistic is 1.57 find the
would this prove that they are exceeding their goal, using α = .025?
Records show that the probability is 0.0012 that a person will get food poisoning spending a day at a certain state fair. Use the Poisson approximation to the binomial distribution to find the probability that among 1,000 persons attending the fai..
the manager of fyz incorporated has been presented with the following lp modelminimize z 30a 45b costsubject to5a 2b
Test the claim about population mean, u, at given level of significance using given sample statistics. Find out critical value(s).
an elementary school class ran 1 mile in an average of 11 minutes with a standard deviation of 3 minutes. rachel a
A student in statistics argues that the concepts of mutually exclusive events and independent events are really the same , and that if events are mutually exclusive they must be independent. Do you agree with this statement? Use the probability in..
It is known that a healthy human body has an average temperature of 98.6?F, with a standard deviation of 0.95?F. Sixty healthy humans are selected at random. What is the probability that their temperatures average at least 99.1?F?
For a school project, he will display an equal number of each kind of stamp on a small poster boards. What is the greatest number of poster boards Adam can make if he uses all of the stamps?
Credit card companies have aggressively solicited new accounts from students who are new homeowners. Suppose that a sample of 150 new homeowners indicated the following information as to whether they possessed a Visa Card or an American Express Ca..
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