1. 9.3 Experimental Probability

2. 9.3 Ten students each have a penny. If student 1 tosses the penny, what is the probability that it will land on heads? If student 4 tosses the penny, what is the probability that it will land on heads? If student 9 tosses the penny, what is the probability that it will land on heads? If all the students toss their pennies, what is the probability they will all land on heads?

3. 9.3 Experimental Essential Question: What is meant by experimental probability?

4. 9.3 Conducting an Experiment Work with a partner. Toss the 3 coins 32 times. Tally the results using the outcomes listed below. Organize the results in a bar graph. Use the bar graph to estimate the probability of each outcome. These are called experimental probabilities. a) HHH b) THH c) TTH d) TTT

5. 9.3 Analyzing the Possibilities Work with a partner. A tree diagram helps you see different ways that the same outcome can occur. A) Find the number of ways that each outcome can occur: *Three HsT H T H *One T and two Hs T H T H T H T H *Two Ts and one H TTT TTH THT THH HTT HTH HHT HHH *Three Ts  B) Find the theoretical probability of each outcome.  C) Compare and contrast your experimental and theoretical probabilities. T H

6. 9.3 What is your answer? IN YOUR OWN WORDS What is meant by experimental probability? Give a real-life example of experimental probability.

7. 9.3

8. Warm-Up

9. 9.2 Section Quiz 9.2 Section Quiz

10. 9.3 Lesson What is the difference between theoretical and experimental probability? Theoretical is what should happen-it’s a math problem. Experimental is what does happen in an experiment.

11. 9.3 Lesson

14. On Your Own 1) In Example 1, what is the experimental probability that your next email in NOT junk? 2) At a clothing company, an inspector finds 5 defective pairs in a shipment of 200 jeans. A) What is the experimental probability of a pair of jeans being defective? B) About how many would you expect to be defective in a shipment of 5000 pairs of jeans?

15. 9.3 Lesson

16. On Your Own In Example 3, what is the experimental probability of rolling a number greater than 1? How does this compare with the theoretical probability of rolling a number greater than 1?

17. 9.3 Lesson