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The movie "2012" is based on several doomsday prophecies as disparate as the Mayan calendar, numerological constructions, and messages from extraterrestrial beings. As a rational thinking statistician, you decide to find out what proportion of the U.S. population actually believes in these prophecies. You take a randomly collected sample of 350 people and discover that 45 of them believe at least "somewhat" in the predictions. Construct a 95% confidence interval for the proportion of U.S. population who believe at least "somewhat" in doomsday prophecies. (Show your work or formula.). Interpret the interval.
what is the probability that the individual actually has the disease ?
Find a 95% confidence interval for the long-run proportion of new product placements?
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State the direction of the alternative hypothesis used to test that the demand function is downward sloping. Type gt (greater than), ge (greater than or equal to), lt (less than), le (less than or equal to) or ne (not equal to) as appropriate in the ..
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a) Specify the null and alternate hypotheses for testing that the population correlation is negative. b) Calculate the estimate of the population correlation coefficient between X and Y.
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