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In a survey of 500 randomly selected high school students, it was determined that 288 played organized sports. What is the probability that a randomly selected high school student plays organized sports?
A sample size n=100 is taken from a population that has a proportion p= 1/5. If, in the sample, ^p=0.25, will the 95% confidence interval for p contain the true value of p^is at top p at bottom ^p
In light of these data, are the percentages of divorcing couples with prenuptial agreements equal in these four places?
Suppose a certain brand of Westinghouse light bulbs has a population life expectancy of 3000 and a population standard deviation equal to 100. (Assume the distribution of the population is normal). What is the probability that a sample of 30 light..
What descriptive summary measures would you use to present the data. which measure is the best to use and which is the worse and why?
What can you say with 95% confidence about the percent of all American adults who think that humans developed from earlier species of animals.
In a study designed to test the effectiveness of acupuncture for treating migraine, 142 subjects were treated with acupuncture and 80 subjects were given a sham treatment. The numbers of migraine attacks for the acupuncture treatment group had a m..
Suppose you want an 85 percent confidence level. What value would you use to multiply the standard error of the mean?
Identify the indicated values or interpret the given display. In a survey of 703 randomly selected workers,
Determine whether there is a difference in the mean weights of candies of different colors. Use the .05 significance level.
A company is filling bags of rock salt to a level of 50 pounds. It believes that all bags are filled correctly, but would like to use a hypothesis test with an alpha of 0.05 to check this belief.
Which of the following models are appropriate to forecast a time series whose amplitude increases over time?
if 30 claims are selected, find the probability that 15 will contain 0 errors, 8 will contain 1 error, 5 will contain two errors and 2 will contain 3 errors.
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