Descriptives Years math teacher has taught high school math 95% Confidence Interval for Mean N Mean Std. Deviation Std. Error Lower Bound Upper Bound Minimum Maximum Less than 3 years 186 9.84 7.855 576 3.71 10.98 31 3 to less than 4 years 1341 10.57 8.763 .239 10.10 11.04 31 4 years 1847 10.07 8.434 196 9.68 10.45 31 Total 3374 10.26 8.537 147 9.97 10.54 31 Tests of Homogeneity of Variances Levene Statistic df1 df2 Sig. Years math teacher has taught Based on Mean 3.717 337 024 high school math Based on Median 1.795 N 3371 166 Based on Median and with 1.795 N 3359.599 166 adjusted df Based on trimmed mean 3.199 2 3371 .041 ANOVA Years math teacher has taught high school math Sum of Squares df Mean Square F Sig. Between Groups 230.306 2 115.153 1.580 206 Within Groups 245615.468 3371 72.861 Total 245845.774 3373 Robust Tests of Equality of Means Years math teacher has taught high school math Statistic dfl df2 Sig. Welch 1.578 2 520.591 207 Brown-Forsythe 1.684 2 911.002 186 a. Asymptotically F distributed