Conducting and analysing an Experiment Work with a partner. Part A: Work through the following parts to learn about how to conduct an experiment and analyze the examples. Planning a question or conjecture When you pose a question or conjecture for an experiment to collect two-variable data, you should follow these steps. Find a topic that interests you. Identify the two variables for the topic. Pose a question or make a conjecture about a possible relationship between the variables. 1. Identify the variables that are being studied in each experiment. Kasey wants to prove that a person's height is positively related to the number of basketball free throws he or she can successfully make in 10 attempts. Ramon wants to determine if there is a relationship between a person's height and walking speed. 2. Write a question or conjecture for each experiment in question 1. Developing a method When you develop a method for measuring or collecting data, think about these issues. . Reduce the effects of other variables by keeping all other factors in the experiment the same, as much as possible. . If you cannot think of a way to measure each variable, plan a different experiment. 3. Refer to Ramon's experiment in question 1. What method could Ramon use to measure height? What method could he use to measure walking speed? What can be different about the people he includes in his experiment? Explain why the people should be about the same in these ways: age, body type, and fitness level. Determining what materials you will need As you develop a method, plan what you will need for the experiment. Keep the availability and the cost of materials in mind. 4. Refer to question 3. Describe materials for Ramon's experiment