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, but the added weight may hamper theflight during escape. Random samples of Green-veined White (Pieris napi)butterflies were the subjects of a Swedish study to investigate the escape flights ofsingle butterflies and of mating pairs when exposed to a predator. Data on the initialtakeoff escape velocities are presented below. The investigators consideredperforming a hypothesis test to determine if there was evidence that the mean take offescape velocity was different for singles and pairs. Using a graphical procedure ofyour choice, determine if the t-test is appropriate.

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The Answer of 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, but the added weight may hamper theflight during escape. Random samples of Green-veined White (Pieris napi)butterflies were the subjects of a Swedish study to investigate the escape flights ofsingle butterflies and of mating pairs when exposed to a predator. Data on the initialtakeoff escape velocities are presented below. The investigators consideredperforming a hypothesis test to determine if there was evidence that the mean take offescape velocity was different for singles and pairs. Using a graphical procedure ofyour choice, determine if the t-test is appropriate.

A Number of Butterfly Species Mate for Hours, and If