splash screen. ccss mathematical practices 4 model with mathematics. common core state standards ©...
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Mathematical Practices
4 Model with mathematics.
Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.
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You calculated simple probability.
• Calculate experimental probabilities.
• Design simulations and summarize data from simulations.
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• theoretical probability
• experimental probability
• relative frequency
• simulation
• probability model
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Theoretical Vs. Experimental Probabilities
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Find Experimental Probability
A die is rolled 50 times and the results are recorded. Find the experimental probability of rolling a prime number.
We are asked to find the probability of rolling a prime number. Therefore, we need to consider rolling a 1, 2, 3, or 5.
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Find Experimental Probability
Answer: The experimental probability of rolling a prime
number is
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A spinner is spun 50 times and the results are recorded. Find the experimental probability of landing on an odd number.
A.
B.
C.
D.
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• A simulation can be used to model an experiment that would be difficult or impractical to perform otherwise.– In a simulation, a Probability Model is used to
recreate a situation so that the experimental probability of an outcome can be found.
• A Probability model is a mathematical model used to represent the theoretical probability of the outcomes in an experiment.
What is Simulation?
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Design a Simulation
SOFTBALL Mandy is a pitcher on her high school softball team. Last season, 70% of her pitches were strikes. Design a simulation that can be used to estimate the probability that Mandy’s next pitch is a strike.Step 1There are two possible outcomes: strike and no strike (a ball). Use Mandy’s expectation of strikes to calculate the theoretical probability of each outcome.
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Design a Simulation
Step 2We can use the random number generator on a graphing calculator. Assign the integers 1-10 to accurately represent the probability data.
Step 3A trial will represent one pitch. The simulation can consist of any number of trials. We will use 50.
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A. Use a random number generator for 50 trials with integers 1 through 10. 1-6: the bus is late; 7-10: the bus is not late.
B. Use a random number generator for 50 trials with integers 1 through 10. 1-6: the bus is not late; 7-10: the bus is late.
C. Flip a coin for 50 trials. heads: the bus is late; tails: the bus is not late.
D. Roll a die for 50 trials. 1-4: the bus is late; 5-6: the bus is not late.
SCHOOL BUS Larry’s bus is late 60% of the time. Design a simulation that can be used to estimate the probability that his bus is late.
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Conduct and Evaluate a Simulation
SOFTBALL Mandy is a pitcher on her high school softball team. Last season, 70% of her pitches were strikes. Conduct the simulation that can be used to estimate the probability that Mandy’s next pitch is a strike.
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Conduct and Evaluate a Simulation
Possible outcome
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Conduct and Evaluate a Simulation
Calculate the experimental probabilities.
Answer:
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SCHOOL BUS Larry’s bus is late 60% of the time. Conduct a simulation that can be used to estimate the probability that his bus is late.
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• Independent Practice/Homework:– P. 783 #’s 3-8
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