Math Statistics

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Math Statistics

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Lottery Prizes A lottery offers one $900 prize, two $700 prizes, three $300 prizes, and five $200 prizes. One thousand tickets are sold at $6 each. Find the expectation if a person buys four tickets. Assume that the player's ticket is replaced after each draw and that the same ticket can win more than one prize. Round to two decimal places for currency problems. The expectation if a person buys four tickets is dollar(s).
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The overhead reach distances of adult females are normally distributed with a mean of 197.5cm and a standard deviation of 8.3cm.a. Find the probability that an individual distance is greater than 207.50 cm. b. Find the probability that the mean for 25 randomly selected distances is greater than c. Why can the normal distribution be used in part (b), even though the sample size does not exceed 30?
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Math Statistics

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