here's my question

2) (6 pts.) Let X be a random variable, and let X1,...,X40 be a random sample of X. Suppose we observe that of our 40 samples, 25 of the samples take value 1, 7 of the samples take value 2, 6 of the samples take value 3, and 2 of the samples take value 4 or higher. Use a chisquared goodnessoft statistic to test H0 : X has a geometric distribution with parameter 1/2 at the signicance level a = 0.05. (Recall that by the conventions in this class, a geometric random variable is supported on {1, 2, 3,4,. . . }.)