For mallard ducks and Canada geese, what percentage of nests are successful (at least one offspring survives)? Studies in Montana, Illinois, Wyoming, Utah, and California give the following percentages of successful nests (Reference:The Wildlife Society Press, Washington, D.C.).

x:Percentage success for mallard duck nests2680712671y:Percentage success for Canada goose nests6639155148

(a) Use a calculator to verify thatx=274;x²=17,834;y=219; andy²=11,007.xx²yy²

(b) Use the results of part (a) to compute the sample mean, variance, and standard deviation forx, the percent of successful mallard nests. (Round your answers to four decimal places.)xs²s

(c) Use the results of part (a) to compute the sample mean, variance, and standard deviation fory, the percent of successful Canada goose nests. (Round your answers to four decimal places.)ys²s

(d) Use the results of parts (b) and (c) to compute the coefficient of variation for successful mallard nests and Canada goose nests. (Round your answers to one decimal place.)xyCV%%