Unit 1 Contents

When scientists have data, they look for patterns. Drawing a graph of your data can help you see patterns that are hard to notice in the data table. The third step in the TIMS Laboratory Method is graphing.

9. Make a bar graph of your class data using Centimeter Grid Paper. Graph the Number of Eyelets (E) on the horizontal axis ( ) and the Number of Pairs of Shoes (P) on the vertical axis .

The last step in the TIMS Laboratory Method is to analyze the whole experiment. This means to understand what happened and to use your understanding to make predictions. Questions for new investigations may also come up during this step. Most labs have questions to help you better understand the important ideas.

Use the class graph and data table to answer the following questions. Compare your answers to your estimates in Question 7. Your teacher may ask you to answer these questions alone or in small groups. Be ready to explain how you found your answers.

1. How many pairs of shoes have 20 eyelets?
2. How many pairs of shoes have 8 eyelets?
3. How many pairs of shoes have 0 eyelets?
1. What number of eyelets is most common in your class? (This number is called the mode.)
2. How can you find the mode by looking at your graph?
1. List all the values for Number of Eyelets that have bars above them.
2. What do you notice about these numbers? Explain.
13. Alexis told her class that she had 14 eyelets on her pair of shoes. Do you think she is correct? Why or why not?