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For a certain random variable having the normal distribution, the probability is 0.33 that it will take on a value less than 245, and the probability is 0.48 that it will take on a value greater than 260. Find the mean and standard deviation of this probability distribution.
Sample of newspaper readers was asked to report which newspaper they read and to point to whether they were blue-collar worker, white-collar workerNewspaper reader is selected at random. Determine the probability that person selected.
An airline owns an aging fleet of Boeing 737 jet airplanes. It is considering a major purchase of up to 17 new Boeing model 757 and 767 jets.
Analyze the DT to determine the optimal strategy for the company. What is the expected value of the optimal strategy? Develop a risk profile for the optimal strategy.
If the production process is in control, the mean number of chips per cookie is 6.0 What is the probability that in any particular cookie being inspected. What is probability that in any partcular cookie being inspected, there are less than 4 choco..
The following is sample information. Test the hypothesis at the .05 significance level that the treatment means are equal.
A sample of 49 repairs showed an average overhaul of 285 hours with a standard deviation of 50 hours. Calculate a 95% confidence interval for the average overhaul.
Its known that 5% of all AA bateries made by Power Manufactures are defective. AA batteries are sold in packs of 4. Find the probability that a pack of 4 has exaclty 2 defective batteries.
A random group of apartments was selected from a city to analize the number of bedrooms they have. Is there evidence to reject the hypothesis that the apartments are equally distributed between 1 bedroom, 2 bedroom, and 3 bedroom apartments, at al..
How would your colleagues probably react to such a statement of yours? Is their expected (positive or negative) reaction the local cultural habit in your company or is it a wider position common for people in your country?
A recent report in BusinessWeek indicated that 20 percent of all employees steal from their company each year. fewer than 5 employees steal?
Determine the critical z values. Suppose that normal distribution applies. Right-tailed test; standard deviation = 0.04.
A newspaper reports have 58 percent of farmers are planning to plant genetically modified crops presesnt year. The article adds that the poll is based on a random sample.
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