Three marbles are selected from an urn con- taining 5 red marbles and 3 green marbles.

Three marbles are selected from an urn con- taining 5 red marbles and 3 green marbles. after the number x of red marbles is recorded, the marbles are replaced in the urn and the experiment repeated 112 times. the results obtained are as follows: x0123 f 1 31 55 25 test the hypothesis, at the 0.05 level of significance, that the recorded data may be fitted by the hypergeo- metric distribution h(x; 8, 3, 5), x = 0, 1, 2, 3.