A professor tests whether the loudness of noise during an exam (low, medium, high) is independent of

Question:

A professor tests whether the loudness of noise during an exam (low, medium, high) is independent of exam grades (pass, fail). The following table shows the observed frequencies for this test.

(a) Conduct a chi-square test for independence at a .05 level of significance. Decide whether to retain or reject the null hypothesis.
(b) Compute effect size using Cramer's V.