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standard deviation Suppose that the probabilities of a customer purchasing 0, 1, or 2 books at a book store are 0.3, 0.3, and 0.4, respectively

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standard deviation stock that will return $100 profit if the stock goes up today and lose $500 if it goes down.

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An orthodontist has three financing packages, and each has a different service charge. He estimates that 30% of patients use

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A marketing agency has developed three vacation packages to promote a timeshare plan at a new resort.

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Given independent random variables, X and Y, with means and standard deviations as shown, find the mean

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A broker has calculated the expected values of two different financial instruments X and Y. Suppose that

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A small software company will bid on a major contract. It anticipates a profit of $15,000 if it gets it, but thinks

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A commuter finds that she waits an average of 18.5 seconds at each of four toplights, with a standard deviation of 6.5 seconds.

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An insurance company estimates that it should make an annual profit of $230 on each homeowner's policy

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A bicycle shop plans to offer 2 specially priced children's models at a sidewalk sale. The basic model will return a profit of $110

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