2. It’ll definitely happen!!! It’ll NEVER happen!!! It might happen There is a strong chance it’ll happen It is not very likely it’ll happen. Tomorrow will be Monday Pizza will be served for lunch today The sky will darken tonight There will be a snow day tomorrow You will have homework tonight What other examples can you think of??? Probability is a measure of how probable it is that an event will occur.

3. Data is collected through observations or experiments. Each result from the experiment is called an event. The probability of an event is equal to the number of times an event occurs divided by the total number of experiments. P (event) = Number of times an event occurs Total number of experiments

4. P (event) = Number of times an event occurs Total number of experiments Event = scoring a basket Number of baskets scored Number of shots taken

5. Problem: A spinner has 4 sectors colored yellow, blue, green and red. An experiment is spinning the spinner to see what color it lands on.

6. Vocabulary An event is one or more outcomes of an experiment. One event of this experiment is landing on blue.

7. Student Experimental Results Let’s Experiment! Color Number of times landing on this Color Total number of spins Probability of landing on this color Red Yellow Blue Green

8. If we were to spin the spinner 200 times, how many times would we expect to land on blue? If we were to spin the spinner 50 times, how many times would we expect to land on green? If we were to spin the spinner 150 times, how many times would we expect to land on red? Using Data to Make Predictions

9. Favorite Food Favorite Food Number of Students Hot Dogs24 Hamburgers18 Pizza21 Chicken Nuggets12 A group of fifth graders were surveyed about their favorite food. The chart above shows the results. Based on this information, if 25 more fifth graders were surveyed, how many would you expect to choose: Hot dogs? Hamburgers? Pizza? Chicken Nuggets? What if 50 more students were surveyed?