Mathematics, 06.01.2020 18:31 loran55667
At a large university, data were collected on the number of sisters and brothers that each student had. let the random variable x x represent the number of sisters and the random variable y y represent the number of brothers. the distribution of x x has mean 1.00 and standard deviation 0.94. the distribution of y y has mean 1.07 and standard deviation 1.04. what is the mean of the distribution of x+y x + y ?
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