Darwin's Zea Mays experiment comparing cross-pollinated to self-pollinated
plants. The response for each plant is height. The seeds were
planted in pairs.
"Darwin" <-
structure(list(Pot = c(1, 1, 1, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4,
4, 4), Crossed = c(23.5, 12, 21, 22, 19.125, 21.5, 22.125, 20.375,
18.25, 21.625, 23.25, 21, 22.125, 23, 12), Self = c(17.375, 20.375,
20, 20, 18.375, 18.625, 18.625, 15.25, 16.5, 18, 16.25, 18, 12.75,
15.5, 18)), .Names = c("Pot", "Crossed", "Self"),
class = "data.frame", row.names = c("1", "2", "3", "4", "5",
"6", "7", "8", "9", "10", "11", "12", "13", "14", "15"))