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A forced-choice design is often used to compare the attractiveness of pheromones to insects. A Y-tube is used. The pheromone is placed on one branch,
A forced-choice design is often used to compare the attractiveness of pheromones to insects. A Y-tube is used. The pheromone is placed on one branch, the control on the second branch, and the insect on the third branch. The insect then chooses one of the two branches. Suppose that 45 of 75 insects choose the pheromone branch. The null and alternative hypotheses for testing the hypothesis of no preference are:
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