We would like to conduct an analysis of variance at the 1% level of significance to compare the mean weights of four breeds of livestock. We weigh a random sample of 4 goats, 5 horses, 6 sheep and 3 pigs. The test statistic is calculated to be F = 3.19. We conclude that: there is insufficient evidence that all four population means are equal. there is sufficient evidence that all four population means differ. there is insufficient evidence that all four population means differ. there is insufficient evidence that at least one population means differ from the others. there is sufficient evidence that at least one population means differ from the others