CEVAP:

For the one-way ANOVA test, the test statistic is the ratio of two variances: namely the variance between samples and the variance within samples. These variances constitute the estimates of the population variance. The variance between samples are also called as between group variance, and the variance within samples are also called as within group variance. The variance between samples measures the differences associated with the treatment which is given to each sample and abbreviated as MSB . On the other hand, the variance within samples measures the differences associated with observations within the same sample abbreviated as MSW . The test statistic for a one-way ANOVA test is the ratio of two variances; namely the variance between samples (MSB) and variance within samples (MSW).