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Faculty in the psychology department at the state university consume an average of 5 cups of coffee per day with a standard deviation of 1.5. The distribution is normal. What proportion of faculty consume an amount between 4 & 6 cups?
What is a 99% confidence interval for the true proportion of dentists in the population that would make such a recommendation?
An experiment is designed to test the potency of a drug on 20 rats. Previous animal studies have shown that 10-mg dose of the drug is lethal 5% of the time within the first 4 hours; of the animals alive at 4 hours, 10% will die in the next 4 hours..
The diameters of a wooden dowel produced by a new machine are normally distributed with a mean of 0.55 inches and a standard deviation of 0.01 inches. What percent of the dowels will have a diameter less than 0.57?
If Weight 1 is the weight (in pounds) of a random sample of five men who were accepted as models, and Weight 2 is the weight (in pounds) of a random sample of five men who were rejected as models, which of the following is the appropriate inferenc..
Population have at least some college education. choose 10 persons at random. Find the probability that at least 5 do not have any college education.
Same chance of being selected as does any other group. What is the probability that at least one of the shifts will be unrepresented in that sample of workers?
Construct a frequency distribution of the sample mean, and plot a histogram of this distribution. Use the central limit theorem to calculate and identify the sampling distribution of the sample mean.
Statistics is science of conducting studies to: Solve a system of equations.
Nyobia had a population of 3 million in 1985. Assume that this country's population is growing continuously at a 5% annual rate and that Nyobia absorbs 40000 newcomers every year.
A processor of carrots cuts the green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted in a box for shipment. To test the weight ofthe boxes, a few were checked.
What values would be appropriate for the performance measures listed in the preceding problem for the case in which two tellers are available?
Determine the cost Xs to develop the support system for which the probability of exceeding Xs is equal to 0.01?
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