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The National Park Service has started charging a user fee to park at selected trailheads and crosscountry ski lots. Some users object to this fee, claiming they already pay taxes for these areas. The agency has decided to randomly question selected users at fee areas in Colorado to assess the level of concern.
a. Define the population of interest.
b. Assume a sample of 250 is required. Describe the technique you would use to select a sample from the population. Which sampling technique did you suggest?
c. Assume the population of users is 4,000. Use either Minitab or Excel to generate a list of users to be selected for the sample.
find the area under the normal curve to the left of z -1.57 plus the area under the normal curve to the right of z 2.57
a research firm tests the miles-per-gallon characteristics of three brands of gasoline. because of different gasoline
What should the pass mark be set at if 15% are to fail? If the examiner wishes to grant the top 20% A's, what should be the cut-off mark for an A?
A side effect of a certain anesthetic used in surgery is the hiccups, which occurs in about 10 percent of the cases. If three patients are scheduled for surgery today and are to be administered this anesthetic, compute the probability that:
the financial department at a large hospital would like to estimate the average outstanding balance owed by patients
If its weekly cost function is C(x)=68,000+150x, how should the manufacturer set the size of the rebate in order to maximize its profit?
a small business just leased a new computer and color laser printer for three years. the service contract for the
What is the probability that none of the next eight customers who order beer will order light beer? What is the probability that one customer will? What is the probability that two customers will?
A survey of magazine subscribers showed that 55.8% rented a car during the last 12 months for business reasons, 44% rented a car for personal reasons, and 25% rented a car for both business and personal reasons.
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
Would you suspect that the IDEA surveys sent to South students each term could be biased in the responses received? Why or why not?
What does this theorem allow you to do that traditional statistics do not? What are some prerequisites for using Bayesian statistics?
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