Experimental Probability Tables

Probability Using a Spinner or Table

Experiment vs. Theoretical

Poll

How are you today?

• Doing Great

• I'm okay

• Not too good, it could be better

• I'm really feeling bad

Probability with a Spinner

• Count how many sections are in the spinner. This is the total

• Determine how many on the spinner is the result you need to find

• Possible needs/total sections on spinner

• Read the problem and look for words to pay attention to--not, and, or

• Enter the fraction in simplest form

• Write the way the question wants the probability if they want a fraction, decimal or percent

Fill in the Blanks

What is the probability of the spinner not landing on 4 ?

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What is the probability of the spinner not landing on 3 ?

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Do you have an equal chance of landing on either 2 or 4 ?

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What is the probability of the spinner not landing on 1 ?

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What is the probability of the spinner not landing on 1 or 3 ?

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What is the probability of the spinner landing on 2 or 3 ?

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What is the probability of the spinner landing on 3 ?

Probability

With Tables

How To Use Tables to Find Probability

• If a total is not given, find the total

• Find the frequency needed/total

• Reduce the fraction if needed.

• Pay attention to the question, look for not, or, and

• If you need a decimal, divide frequency and total

• To find a percent, move the decimal two places to the right. Ex: 0.50 = 50%

• If the word theoretical is used, the table is not used. You need to use what happens in one outcome for needed result.

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What is the probability of rolling a 3(use the table)? Write a fraction, percent and decimal.

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What is the theoretical probability of rolling a 3? Write a fraction, percent and decimal.

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What is the probability of rolling a number less than 3(use the table)? Write a fraction, percent and decimal.

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What is the probability of rolling a 3 or a 5(use the table)? Write a fraction, percent and decimal.