Unit 1 Contents

1. If you measured a new classmate's arm span and height, where do you think his or her data would lie?
2. If a fourth-grader from another classroom had an arm span of 53 inches, what would you predict about his or her height?
3. Why do you think so?
1. In which part of the graph would first-grade data cluster in comparison to fourth-grade data—in the area marked A, B, or C? Why do you think so?
2. In which cluster would a kangaroo's data fall—in the area marked A, B, or C? Why do you think so?

Use your class graph to discuss the following.

7. Use your graph to estimate the average arm span of your classmates. (Hint: This is a number that represents all the arm spans in your classroom.)
8. Use your graph to estimate the average height of your classmates.
1. Find the median height in your class.
2. Find the median arm span in your class.
3. Compare with your estimate. Were you close?