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A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random smaple of 130 of the school's students, 32% of them plan to go into general practice. Find the P-value for a test of the school's claim.
An automobile insurance company estimates the following loss probabilities for the next year on a $25,000 sports car:
Use a calculator or appropriate computer software to verify that, for the preceding data, xbar = 5.1.
In a standard test for reaction time, female candidates for flight school are found to have times that are normally distributed with a mean of 0.65 seconds and a standard deviation of 0.15 seconds.
In comparing two variances below, determine test value and what are degrees of freedom that must be used?
Among its various routes, a transit agency operates a trolley line. The line has a total of 18 trolley cars. Some of these cars are unavailable because they are being maintained or repaired.
A safety engineer claims that only 40% of all workers wear safety helmets when they eat lunch at the workplace. Assuming that his claim is right, find the probability that at most 4 out of 6 workers randomly chosen will be wearing their helmets wh..
The following is a case-control study: Obtaining histories and other information from a group of known cases and from a comparison group to determine the relative frequency of a characteristic or exposure under study.
The sampling distribution of mean score is approximately Normal. It has mean. What is its standard deviation?
What is the probability that there will be a stock out? Given that you, the maintenance officer at the facility, want the probability of a stock out to be no more than 5% what should the reorder point be?
The GMAT scores of MBA students is assumed to be distributed normally with a mean of 530 and a standard deviation of 80. The GMAT scores of ten students are selected randomly.
How much should a healthy shetland pony weigh? Let X be the age of the ponies in months and y be the average weight of the ponies, in kilograms.
What are the hypotheses we would want to test for the Kleenex case?
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