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1. Smoking, 2008. Public health statistics indicate that 20.6% of American adults smoke cigarettes. Using the 68-95-99.7 Rule, describe the sampling distribution modelfor the proportion of smokers among a randomly selected group of 50 adults. Be sure to discuss your assumptions and conditions.
2. Vision. It is generally believed that nearsightedness affects about 12% of all children. A school district has registered 170 incoming kindergarten children.
a) Can you apply the Central Limit Theorem to describe the sampling distribution model for the sample proportion of children who are nearsighted? Check the conditions and discuss any assumptions you need to make.
b) Sketch and clearly label the sampling model, based on the 68-95-99.7 Rule.
c) How many of the incoming students might the school expect to be nearsighted? Explain.
suppose the results of the analyses in problem 15-17 are reported and criticized because the participants were not
a truefalse pop quiz contains seven questions. what is the probability that when guessing a student will get at least
Suppose 100 randomly selected customers were asked to rate a particular service they recently had on a scale of 0 to 10. The sample mean rating was found to be 7.3.
Addition Thermo on Probability - If a man is randomly selected for an interview, what is the chance he will Play football or basketball?
If Intel Corp.'s shipment contains 10% defective microprocessors, calculate the probability the entire shipment will be returned.
An apple juice producer buys all his apples from a conglomerate of apple growers in one northwest state. The amount of juice squeezed from each of these apples
Construct a 99% confidence interval for the population mean tread wear for this type of tire.
Determine the probability that tire wears out before 70,000 miles?
Sample data recently collected indicate that Dough Boy's crusts average 30 centimeter in diameter, with a standard deviation of 1.1 centimeters.
In doing so, you collect a random sample of 50 salespersons employed by his company, which is thought to be representative of sales staffs of competing organizations in the industry. The collected random sample of size 50 showed that only 18 were ..
The intensity level of an earthquake is based on the Richter scale. Using logarithms, the Richter scale measures an earthquake relative to (as a ratio of) the weakest possible tremor.
Find the P value or an interval containing the P value for the sample test statistic.
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