The print version allows teachers to use the problem with their students without giving the students access to the archived answers.
Teachers can use the link to the archived problem to get ideas of student thinking.
Fish Farm II extends the concepts of ratio and equivalent ratio to a situation in which the ratio of male to female fish in a large lake is unknown. The number of repeated trials that a student runs should affect the reasonableness of his or her estimate. Students should note that the ratio of male to female fish is unstable with a small number of trials, and tends toward a more stable ratio with a large number of trials. The pre-activity is designed to introduce students to sampling with replacement, the difficulty of making predictions based on small samples, and how to convert data to percentages and represent those percentages in a pie graph. Two different ideas are listed as possible post-activities.