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BusinessWeek conducted a survey of graduates from 30 top MBA programs (BusinessWeek, September 22, 2003). On the basis of the survey, assume that the mean annual salary for male and female graduates 10 years after graduation is $168,000 and $117,000, respectively. Assume the standard deviation for the male graduates is $40,000, and for the female graduates it is $25,000.
What is the probability that a simple random sample of 100 male graduates will provide a sample mean more than $4,000 below the population mean (to 4 decimals)?
The mean television viewing time for Americans is 15 hours per week (Money, November 2003). Assume a sample of 60 Americans is taken to further investigate viewing habits. Suppose the population standard deviation for weekly viewing time is Q = 4..
transrail is bidding on a project that it figures will cost 400000 to perform. using a 25 markup it will charge 500000
A production process manufacturers alternators. On the average, 1% of the alternators will not perform properly when tested in the plant. When a large shipment of alternators is received at the plant
Each patient also submits the blood sample and their glucose tolerance status is determined. Determine the sensitivity of screening test?
The researchers claimed that of those who completed the program, 85% improved. What possible confounds can you identify in this study?
given the correlation value between anxiety and exam score could you assume that heightened anxiety is causing at least
What is the 95 percent interval for the population mean?
when the background music was slow the mean amount of bar purchases for a sample of 17 restaurant patrons was 30.47
What is the difference in appearance between a t-distribution and a z-distribution? Why do they have slightly different appearances?
A random sample of 35 clients' receipts gave a mean of $34.70 with standard deviation s= $4.85. Find a 90% confidence interval for the average amount spent by all clients
Is the normal distribution (or its special case, the standard normal distribution) effective in characterizing situations and/or in helping managers make decisions?
question 1using the telephone numbers listed in your local directory as your population randomly obtain 20 samples of
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