ECON 15A Study Guide - Midterm Guide: Random Variable, Standard Deviation, Independent And Identically Distributed Random Variables

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5 Jul 2019
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1 2. (two questions twenty points). Show all work. (two questions twenty points). E(p) = 10, v(p) = 25, e(r) = 30, v(r) = 16, cov(x,y) = 12. Let s = 3p 7r + 5. Draw the distribution of the random variable in the above two questions and visually show that the answers to the above questions make sense. Simply draw the distribution and appropriately indicate the mean and standard deviation. is 8. Let x1 and x2 be two iid random variables. We know that the expected value of x2 is 100. We also know that the expected value of x. A supermarket sells only two types of coffee products, coffee and cream. The store expects to sell worth of coffee and worth of cream each day. The inventory manager is looking at the standard deviation of daily coffee sales, which is , and the standard deviation of cream sales, which is dollars.

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