In Exercise 11.118, we discuss the random variable counting the number of seniors in a sample of

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In Exercise 11.118, we discuss the random variable counting the number of seniors in a sample of four undergraduate students at a university, given that the proportion of undergraduate students who are seniors is 0.25. Find the mean and standard deviation of this random variable.


Exercise 11.118

Suppose that undergraduate students at a university are equally divided between the four class years (first-year, sophomore, junior, senior) so that the probability of a randomly chosen student being in any one of the years is 0.25. If we randomly select four students, give the probability function for each value of the random variable X = the number of seniors in the four students.

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Statistics Unlocking The Power Of Data

ISBN: 9780470601877

1st Edition

Authors: Robin H. Lock, Patti Frazer Lock, Kari Lock Morgan, Eric F. Lock, Dennis F. Lock

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