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1. In a continuous probability distribution, the probability of any particular value is the vertical distance at the value between the horizontal axis and the curve representing the distribution.
2. In a discrete probability distribution, the length of a vertical line at a certain value can be interpreted as the probability that such a value will result from random sampling.
3. If a population is infinite in size, the variable of interest is continuous.
One variable is the customer survey asked about agreement that SPSS products are a good value (gdvalue).
Use the Wilcoxon signed-rank test with a = 0.01 to determine whether there is any evidence that the median APR on student credit cards is less then 15.06.
The length of time patients must wait to see a doctor in a local clinic is uniformly distributed between 15 minutes and 2 1/2 hours. What is the probability of a patient waiting exactly 50 minutes?
A drug that provides relief from headaches was tried on 18 randomly selected patients. The experiment showed that the mean time to get relief from headaches.
The ideal number of children. "What do you think is the ideal number of children for a family to have?" A Gallup Poll asked this question of 1016 arbitrarily chosen adults. Almost half (49%) thought two children was idea suppose that p = 0.49 is e..
a) What is the probability that a randomly selected resident has neither pet? b) What is the probability that a randomly selected resident has a cat
Can students save money by buying their textbooks at Amazon.com? To investigate this possibility, a random sample of 15 textbooks used during the Spring 2007 semester at Iowa State was selected.
The manager of a CVS drugstore in Madison, Wisconsin, obtained a random sample of customers who purchased adhesive bandages.
Suppose that the telephone calls coming into a certain switchboard obey a Poisson probability law at a rate of 16 calls per minute. If the switchboard
A medium-size college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence.
What is the questionnaire score that separates customers who are considered risk averse from those who are not? Carry your intermediate computations.
Provide a 95% confidence interval for the true proportion of residents in this neighborhood who would be interested in purchasing organic coffee.
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