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In 1992,the FAA conducted 86,991 drug test on applicants for employment,1,143 were positive(a)construct a 95% confidence intervalfor the population proportion of positive drug tests.Why is the normality assumption not a problem despite the very small value of p?
The U.S. Fish and Wildlife Service's report on the bass population in the North American lakes indicated average weight of the fish to be 3.0 lb.
Let's say I have a new drug that I think helps diabetics. So I perform clinical trials in accordance with the FDA requirements. I give one randomly selected groups of diabetics the drug, and another sample gets a placebo pill.
Please address the following question: When is the mean the best measure of central tendency? When is the median the best measure of central tendency?
How does a t test differ from a z test in terms of when it is used, how it is calculated, and how we determine significance?
In rectangular coordinate system, determine the distance between the points (-4,1) and (8,6).
Use regression analysis to develop an estimated regression equation that could be used to predict the value score given the price of the car.
Estimate the percentage who weigh more than 180 pounds? Assume that we want 96% confidence that the error is no more than 2 percentage points.
Consider this joint probability distribution P: Determine whether P constitutes a Bayesian network with the DAG X -> Y -> Z:
Verify value of t for the independent Variable, using formula. (That is, using formula in the Formula Sheet compute the t statistic , given data provided in the print out).
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
Sample mean = $40,000, sample standard deviation =$1500 and n= 25. Assume that the population from which the sample is drawn is normally distributed.
If two people are randomly selected, what is the probability both are hopelessly romantic? What is the probability at least one is hopelessly romantic.
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