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The following data are from a prospective cohort study in which a sample of people from a town near a toxic waste site was compared to that from a similar town a hundred miles away in the same state.
The outcome was incidence of all types of cancer over a 5 year period.
Town Cancer - yes Cancer - no
A 42 458
B 37 763
What is the odds ratio of cancer in town A compared to town B?
Which is the better measure of association in this study? Why?
Cholesterol was 186 milligrams with s = 19.0 milligrams. Construct a 95% confidence interval for the true mean cholesterol content of all such eggs.
an urn contains nine white balls and 11 black balls. a ball is drawn and replaced. if the ball is white your opponent
What is the lowest raw score that a client must have on Anxiety Scale A in order to be admitted into this new group? Also assuming some clinics use Anxiety Scale B and often refer their clients to Mary, what is the cutoff point (lowest raw score) ..
The items produced weigh between 100 grams up to the mean and 49.18% weigh from the mean up to 190 grams. Determine the mean and the standard deviation.
ShopperTrak is a hidden electric eye designed to count the number of shoppers entering a store. When two shoppers enter a store together, one walking in front.
Range of women's heights. In Chance (Winter 2007), Yale Law School professor Ian Ayres published the results of a study he conducted with his son and daughter.
At St. Algebra College, the math department ran some special sections of the freshman math course by using a variety of innovative teaching techniques.
The consultant has offered to share their analysis with your company for a fee of $25.0 million. What is the Expected Value of Perfect Information in this scenario?
Would the researcher be able to obtain a sampling frame? What procedures would the researcher have to follow to obtain a probability sample?
The following data give birth rates (per 1000 population) for 20 selected states in 1998 (source: The World Almanac and Book of Facts 2000).
Utilizing Excel data analysis calculate t distribution also deduce the result. Study of variance is used to investigate if there is a difference in the mean mileage of the three cars.
Describe how you would collect your data, the level of measurement of your data, and which statistical technique you would use to analyze the data. Explain why you chose that statistical technique.
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