A research project investigated the ability of tobacco hornworm caterpillars to learn to associate a particular odor

Question:

A research project investigated the ability of tobacco hornworm caterpillars to learn to associate a particular odor with a mild electric shock. After training five caterpillars, each was placed at the base of a Y-tube. At the fork in the tube, the caterpillar could choose between two sides. One side (randomly assigned) had a breeze of fresh air, whereas the other side had air with the odor present. The direction chosen was recorded in each trial. Each caterpillar was tested three to five times in the Y-tube. The frequency table below shows the total number of times that caterpillars chose the fresh-air and odor-air sides. The researchers used these n=20 observations to calculate an Agresti–Coull 95% confidence interval for the fraction of caterpillars that choose the fresh-air side: 0.63

Frequency Frequency Fresh side 1717 Odor side 33