A researcher was interested in the relationship between years of teaching and attitude toward inclusion. He randomly selected 500 teachers with varying years of service ranging from 1 to 40 years and divided them into two groups according to whether they favored or did not favor inclusion. He constructed a table of expected counts and compared the expected counts with the observed counts. Which statistical procedure did the researcher use to test the null hypothesis?

A. 2 3 ANOVA

B. Chi-square test of independence

C. Multiple t-tests

D. One-way analysis of variance or simple ANOVA