Finally, when their graph was finished, they analyzed and discussed their results.

Irma and Jerome chose to investigate the two variables Hand Length and Height. You, like Irma and Jerome, will investigate two variables which describe your class. The arm span and height of each student in your class will be measured. Your job is to find out whether you can predict a fourth-grade student's height if you know his or her arm span.

You will begin by drawing a picture of what you will do in the experiment. Then, collect and organize data in a table. Next, you will make a graph of the data. Finally, you will explore the data by looking for patterns.

    1. Is arm span a categorical or a numerical variable?
    2. Is height a categorical or a numerical variable? Explain how you know.

Draw a picture to show how you are going to collect data to compare the variables Arm Span (S) and Height (H). Use Irma's hand length and height picture to help you draw a picture. Remember to label the variables.