This is correct. Text reference: Section 19.4 Choosing the Sample Size 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 95% plus-four confidence interval for the proportion of the population that prefers the pheromone branch is: (a) 0.59 i 0.06. (b) 0.59 i 0.11. (c) 0.59 i 0.006