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Experimental Probability the likelihood of an event is estimated by repeating an experiment many times and observing the number of times the event happens
Number of times the event occursPROBABILITY = Number of times the event occurs total number of trials
You must conduct an experiment in order to determine the experimental probability!
Let’s do an experiment in order to find the experimental probability of rolling certain numbers on a die!
Draw this table. My results Roll Tally Marks Frequency 1 2 3 4 5 6
Directions: 1. Roll the die on your desk. 2. Mark your result on the table. 3. Do this 20 times!!
When you have reached 20……STOP!Put your die down on your desk and do not play with it!
Questions: You must write the following questions and then answer them.
What were the possible outcomes when rolling a die?
2. Compare your table with a neighbor. Did they get the same results2. Compare your table with a neighbor. Did they get the same results? Why or why not?
3. Using your data, what is the P(1)?
4. What is P(2)?
5. What is P(3)?
6. What is P(4)?
7. What is P(5)?
8. What is P(6)?
9. What is P(7)?
10. Now, add up your answers for questions 3 – 8. What do you notice?
Bellwork If you roll a die, what is the probability that you roll a 2 or an odd number? P(2 or odd) 2. Is this an example of mutually exclusive, overlapping,
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