A Number of Butterfly Species Mate for Hours, and If

Essay

A number of butterfly species mate for hours, and if a mating couple is disturbed, oneof the butterflies is responsible for flying, carrying its partner with it. Not only aremating pairs more noticeable to predators, the added weight may hamper the flightduring escape. Random samples of Green-veined White (Pieris napi) butterflieswere the subjects of a Swedish study to investigate the escape flights of singlebutterflies and of mating pairs when exposed to a predator. Data on the initial takeoffangle of escape are presented below. The investigators considered performing ahypothesis test to determine if there was evidence that the mean take off angle wasdifferent for singles and pairs. Using a graphical procedure of your choice,determine if the t-test is appropriate.