Experimental Probability 10-2. Vocabulary Experimental probability- is found by comparing the number of times an event occurs to the total number of trials.

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Experimental Probability 10-2

Vocabulary Experimental probability- is found by comparing the number of times an event occurs to the total number of trials.

Experimental probability is one way of estimating the probability of an event. The experimental probability of the event is found by comparing the number of times an event occurs to the total number of trials. The more trials you have, the more accurate the estimate is likely to be.

During skating practice, Sasha landed 7 out of 12 jumps. What is the experimental probability that she will land her next jump? Additional Example 1: Sports Application P(event)  number of times an event occurs total number of trials Substitute data from the experiment = The experimental probability that Sasha will land her next jump is number of jumps landed number of jumps attempted P(jumps landed) 

“P(event)” represents the probability that an event will occur. For example, the probability of a flipped coin landing heads up could be written as “P(heads).” Writing Math

Check It Out: Example 1 During basketball practice, Martha made 9 out of 10 free throws. What is the experimental probability that she will make her next attempt?

Students have checked out 55 books from the library. Of these, 32 books are fiction. Additional Example 2A: Application What is the experimental probability that the next book checked out will be fiction? P(fiction)  number of fiction books checked out total number of books checked out  The experimental probability that the next book checked out will be fiction is approximately Substitute data.

What is the experimental probability that Additional Example 2B: Application the next book checked out will be nonfiction? P(fiction) + P(nonfiction) = 1 The experimental probability that the next book checked out will be nonfiction is approximately Use the complement P(nonfiction) = – – P(nonfiction) = Substitute. Subtract from both sides Simplify.

Check It Out: Example 2A Students have a fruit choice for lunch of an apple or a pear. So far 18 of 47 students have selected pears. What is the experimental probability that the next fruit selected will be a pear?

Check It Out: Example 2B What is the experimental probability that next fruit selected will be an apple?