APFIVE Properties of the Chi-Square Goodness-of-Fit Test
I. The degrees of freedom in a chi-square goodness-of-fit test for a categorical variable with 5 categories is $$5 - 1 = 4$$.
II. For a chi-square test to be valid, all expected counts must be at least $$5$$.
III. A chi-square test uses the $$t$$ distribution to determine critical values.
Which of these statements are true regarding the chi-square goodness-of-fit test?
A
I and II only
B
I only
C
I, II, and III
D
II and III only
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