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1. Create and answer two exponential model questions: Formula y = ab^x
2. Create and answer two continuously compounded interest questions: Formula A = Pe ^r*t
Workers at a large toxic clean up project are concerned that their white blood cell counts may have been reduced. Let x be a random variable that represents white blood cell count per cubic millimeter of whole blood in a healthy adult.
You want to know whether the population means are different in the two populations. Conduct an hypothesis test using an alpha of .05 and the critical value method.
Using the simple test of independence (described in the lecture), decide if the events high calorie and high fiber are independent or dependent. Show your work.
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcox on rank-sum test, evaluate the significance of the results, assuming there are no ties.
What is the probability that at least one of the eight shuttle missions scheduled next year results in a critical-item failure?
The following data shows the service ratings for eight ramdomly selected small ships, eight randomly selected large ships. All ships are rated on a 100-point scale, with higher valuse indicated better service (traveler Feb 2003)
Two-liter plastic bottles used for bottling cola are shipped in lots of 100. Suppose the lots are 5 percent defective. Some bottles leak, some are too small, and so forth.
Determine the rejection region for the hypothesis Ho : mean D= 0 if H a : mean D > 0. Use a = 0.01. z>
What are confounds? Give an example of a design that has three confounds. Describe three ways to alter the design to address these confounds and explain the advantages and disadvantages of each.
What is the approximate probability that the total time spent on the calls will be greater than 98 minutes? Give your answer to four decimal places.
Develop four probability questions using the table that you as an instructor of statistics might ask a class of students for a test in probability.
Assume men's weights are normally distributed w/ a mean of 172 lb. and a s.d. of 29lb.
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