Which of the statements are correct? I. The chi-square goodness-of-fit test uses n - 1 degrees of freedom. II. A condition for using the chi-square goodness-of-fit test is that all expected counts must be at least five. III. A condition for using the chi-square goodness-of-fit test is the observations are based on a random sample. OI only Oll only OI and II only O II and III only O I, II, and III