The categories of a categorical variable are given along with the observed counts from a sample. The

Question:

The categories of a categorical variable are given along with the observed counts from a sample. The expected counts from a null hypothesis are given in parentheses. Compute the Ï‡²-test statistic, and use the Ï‡²-distribution to find the p-value of the test.

Category Observed B 38 (30) 55 (60) 79 (90) 128 (120) A D (Expected)