1. The Color Bowl - Sampling

2. First, mix the bowl – randomize the positions of the marbles in the bowl. The idea is to give, on each draw, each marble in the bowl the same chance of being drawn. After mixing the bowl, draw a single marble from the bowl, note the color of that marble, and then return that marble to the bowl. The group will repeat this process 50 times, recording the frequencies of both observed colors.

3. Division of Labor Mix: Prior to each draw, thoroughly mix the bowl. Draw: Draw a single marble from the bowl, note the color, then return the marble to the bowl. Track: Track the number of draws made and record the frequency of each color.

4. The Color Bowl Model The frequencies of the colors in the bowl form the model, and drive the occurrence of that color in samples drawn from the bowl. The observed sample frequencies for the colors suggest the possible model frequencies for the bowl. That is, the sample (observed) color frequencies suggest the model or population (expected) color frequencies.