ap statistics lesson 6-1 simulation. essential question: how can simulation be used to solve...
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AP STATISTICSLESSON 6-1
Simulation
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ESSENTIAL QUESTION:
How can simulation be used to solve problems involving chance?
Objectives:
To simulate problems of chance with the help of a random number table.
To simulate problems of chance using the calculator.
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Three methods of simulation to answer questions involving
chance.
1. Try to estimate the likelihood of a result by actually carrying out the experiment.
2. Develop a probability model and use it to calculate a theoretical answer.
3. Start with a model that, in some fashion, reflects the truth about the experiment, and then develop a procedure for simulating of repetitions of the experiment.
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Simulation
The imitation of chance behavior, based on a model that accurately reflects the experiment under consideration, is called a simulation.
Independent (trials) – One event has no effect or influence over the next (e.g. coin tosses).
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Simulation Steps
State: State the problem or describe the experiment.
Plan: State the assumptions & assign digits to represent outcomes. Clearly explain
how to identify the outcomes and what variables to measure.
Do: Simulate many repetitions.
Conclude: Use the results of your simulation to answer the question of interest.
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Assigning Digits
Example 6.4A
Choose a person at random from a group of which 70% are employed. One digit simulates one person.
For example:0, 1, 2, 3, 4, 5, 6 = employed
7, 8, 9 = not employed
Note: Other numeric assignments may be used but always try to use the most efficient set.
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Assigning Digits
Example 6.4B
Choose one person at random from a group of 73% are employed. Now two digits simulate one person:
For example:
00, 01, 02, . . . . , 72 = employed
73, 74, 75, . . . . , 99 = not employed
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Assigning DigitsExample 6.4C
Choose one person at random form a group of which 50% are employed, 20% are unemployed, and 30% are not in the labor force. There are now three possible outcomes, but the principle is the same. One digit simulates one person:
For example:0, 1, 2, 3, 4 = employed
5, 6 = unemployed 7, 8, 9 = not in the labor force
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Example 6.6
A couple plans to have children until they have a girl or until they have four children, whichever comes first. We want to estimate the likelihood that they will have a girl.
State:
Plan:
Do:
Conclude:
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Simulation with the calculator
Step 1: Press “Math” button
Step 2: Press right arrow “” twice and highlight Prob.
Step 3: Press “5” randint
Step 4: Enter beginning number, ending number, and the number of values to be chosen
at a time.
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Your turn…
• Exercises 6.1, 6.2, 6.7, 6.12• Follow our 4-step process
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Tonight
Complete Exercise 6.20 (Due tomorrow)
Keep reading, make a note of questions
Watch video lectures
Start WebAssign
Bring your textbooks tomorrow.
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TOTD
Show me
what
you’ve
learned!