## CHAPTER 10: PROBABILITY

**Lesson 6: Comparing Theoretical and Experimental Probabilities **

Use these interactive activities to encourage students to have fun on the Web while learning about probability. Students can try these activities on their own or in pairs.

**Goal**

Compare theoretical and experimental probability for two independent events.

**Builds Upon**

Student Book pages 452–457

**Instructions for Use**

**Adjustable Spinner** allows students to use compare experimental and theoretical outcomes of various spinners.

Use this online, interactive spinner to compare experimental and theoretical probability. Create a different spinner and do the experiment again.

**Probability Spinner** students can use this online spinner to find the experimental probability of different outcomes.

Use this site to conduct a variety of spinner experiments. Compare the experimental probability

**Two Colours** allows students to conduct an experiment in which the outcomes are dependent.

You will be shown three boxes. Click on the first box. Is the marble red or green? How does this change the probability that the next marble will be red? How does this change the probability that the next marble will be green? Figure out the probability of the next marble being red. Figure out the probability of the next marble being green. Then click the next box. Again figure out what is the probability that the next marble will be red and what is the probability that it will be green.

Continue in this way until you have revealed all 6 balls, keeping in mind the sample size and how many green or red balls you have already revealed. Each time you reveal a ball, is the outcome independent or dependent? Explain why.