1. Bell work What is the probability that a randomly selected date in one year is not in the month of April or May? What is the probability that a point chosen at random is in the shaded region? 3 in. 3 in. 5 in. A clerk has 4 different letters that need to go in to 4 different envelopes. What is the probability that all 4 letters will be placed in the correct envelopes?

2. Sectional 7-2: Theoretical and Experimental Probability

3. Instructions Everyone needs a paper bag of materials Get into groups according to the numbers 1-5 on the bottom of the bags Send one group member to the front to get the appropriate worksheet Conduct your experiment and answer the questions on your worksheet You will have 20 minutes to complete the experiment with your group

4. Discussion What was the difference between today and yesterday? Did the concept change? An experiment is an operation, process, or activity in which outcomes can be used to estimate probability What is your experiment?

5. How many times did we try it? A trial is each repetition of an experiment What is your sample space? What might we call this type of probability instead of theoretical probability?

6. Experimental Probability Experimental probability is the ratio of the number of times that the favorable event occurs (the frequency) to the total number of trials EP = # times event occurs # total trials

7. Results What was the experimental and theoretical probability of: Group 1: Drawing out a blue piece of paper? Group 2: Drawing a face card? Group 3: Rolling a sum of 7? Group 4: All coins landing on the same side? Group 5: The spinner not landing on green? What did you notice when comparing the two probabilities?

8. Experimental Probability Worksheet

9. Talk with your neighbor What is the difference between experimental and theoretical probability? Give an example of when these two values might be different.