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Find the sample size required to estimate the mean age of registered drivers in the United States. Assume that we want 95% confidence that the sample mean is within ½ year of the true mean age of the population. Also assume that the standard deviation of the population is known to be 12 years.
Given that he makes first, assume probability that he makes second is 0.60. Given that he misses first, assume probability that he makes second one is 0.40.
You calculate the difference in income as (after incentive plan - before incentive plan). You want to test whether income after the incentive plan is different from income before the incentive plan. What are the hypotheses for this test?
How much production capacity should the manufacturer reserve for the last day?
a random sample of 55 standard hotel rooms in the philadelphia pa area has a mean nightly cost of 154.17 and a standard
Find the test statistic value for two mean tests using equal variance formula.
Conduct a hypothesis test to determine whether the whisper number justifies a conclusion of a statistically significant increase in the consensus estimate of economists. Use a = .01 as the level of significance.
How certain they were about their choice of major. Research question: At α = .01, is the degree of certainty independent of credits earned?
quantitative research questiondownload gpower and play around with it. see how changes in assumptions and parameters
1.an advantage of the permutation test over the t test for a difference in means is thata.it gives accurate p-values
Your director has banned the use of all artificial fingernails, claiming their use contributes to patient infections in the unit. After multiple discussions the director has allowed you to do a research study to determine if the use of artificial ..
Brain cancer is a rare disease. In any year there are about 3.1 cases per 100000 od population. Suppose a small medical insurance company has 150000 people on its books.
Set up hypotheses and carry out all relevant tests. Describe all results and implications which you have discovered.
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