To investigate how pollen removal varied with reproductive caste in bemblebees (Bombus sp.) Harder and Thompson (1989) recorded the proportion of pollen removed by thirty five bumblebee queens and twelve worker bees.
data(bombus)This data frame contains the following columns:
pollenA numeric vector indicating the proportion of pollen removed.
casteA character string vector indicating whether a bee was a worker "W" or a queen "Q".