The ratios of calves to yearlings to adults in a wildebeest herd should be 5:3:2 if the herd is to be stable--that is to neither shrink nor grow in subsequent generations. You go out and take a random sample of individuals from this herd and count 40 calves, 25 yearlings and 10 adults. Do you predict that this herd will remain stable? That is, do the proportions of these 3 age groups in your match those that would be expected in a stable herd?

USE CHI SQUARED TEST ON MINITAB