Select the true statements below regarding one-way ANOVA testing comparing multiple population averages (treatments). Select all choices that apply. When the mean variation within groups falls, the F-statistic will shrink. If variation between groups is large, the ANOVA test will conclude that there is a difference between the groups, regardless of the size of the variation within groups. The F-statistic found in ANOVA testing is found by dividing the mean variation between groups by the mean variation within groups. When the mean variation between groups increases, the ANOVA test will become more likely to result in the rejection of the null hypothesis. Either "variation between groups" or "variation within groups" needs to be considered in ANOVA testing, not both