1. Let X be the number of typographical errors found per page in certain books. Thetable below shows a probability distribution of X.20.1030.0940.010.15P(X)Find the mean of X.0.65A. 0.56В. 0.66С. О.37D. 0.72

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Answered: 1. Let X be the number of typographical…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

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Problem 1RQ

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Assume that adults have IQ scores that are normally distributed with a mean of m = 105 and a standard deviation s =15. Find the probability that a randomly selected adult has an IQ between 91 and 119. The probability that a randomly selected adult has an IQ between 91 and 119 is ____.
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The average student loan debt for college graduates is $25,750. Suppose that that distribution is normal and that the standard deviation is $10,350. Let X = the student loan debt of a randomly selected college graduate. Round all probabilities to 4 decimal places and all dollar answers to the nearest dollar. Find the probability that the college graduate has between $22,700 and $30,000 in student loan debt. (------) The middle 20% of college graduates' loan debt lies between what two numbers? Low: $(______) High: $(_____)
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1. Let X be the number of typographical errors found per page in certain books. The table below shows a probability distribution of X. 2 0.10 3 0.09 4 0.01 0.15 P(X) Find the mean of X. 0.65 A. 0.56 В. 0.66 С. О.37 D. 0.72