The document describes a random sample from a hypergeometric distribution where the population consists of 20 sheep with some number (r) being black and the rest being white. It asks for the method-of-moments estimator of the parameter r, which is the number of black sheep in the total population. The solution provided is a link to a website on point estimation by the method of moments.

1. Suppose that you have a random sample {Y1,Y2,......,Yn} from a Hypergeometric (8,r,20)
population (i.e. each number in your sample is a count of how many 'black sheep' there are
among 8 sheep randomly chosen without replacement from a population of 20 'sheep' that
consists of r black sheep and (20-r) white sheep). What is the method-of-moments estimator of
the parameter 'r'?
Solution
http://www.math.uah.edu/stat/point/Moments.html
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