Group Activity Cards

 Use groups of 2. Materials: A clear jar full of jellybeans, paper Jelly Bean Estimation

Cover the jar with paper and then have your teacher pour jellybeans into the jar. Without being able to see how full the jar is, each student in the class makes a guess as to the number of jellybeans that it contains. Guesses are recorded on the chalkboard.

Each group then completes the following steps.

1. List the data from least to greatest on a sheet of paper.
2. Find the median, the upper quartile, the lower quartile, the interquartile range and the least and greatest values.
3. Draw a number line and graph the median, upper and lower quartiles, and least and greatest values.
Now, remove the paper from the jar. Each student should make a new guess. Record these guesses next to each student's first guess on the chalkboard. Discuss whether the guesses will be more accurate, less accurate, or about the same.

Repeat steps 1-3 for the new set of data. Draw the number line directly below the first number line to compare the two sets of data sets. In what ways are the two data sets similar? In what ways are they different?