Understanding Theoretical and Experimental Probability

What is theoretical probability based on?

• Predictions of future events

• Number of trials conducted

• Definitions from previous lessons

• Actual outcomes of an experiment

What is the theoretical probability of spinning red on a spinner with three equal sections?

• 1/3

• 2/5

• 24/60

• 0.3

What was the experimental probability of landing on red in the spinner experiment?

• 24/60

• 1/3

• 2/5

• 0.4

As the number of attempts in an experiment increases, what is expected to happen to the theoretical and experimental probabilities?

• They become less similar

• They become unpredictable

• They remain constant

• They become more similar

In the dice-rolling experiment, what was the theoretical probability of rolling a sum of nine?

• 8/20

• 1/9

• 4/36

• 2/5

What was the experimental probability of rolling a sum of nine in the dice experiment?

• 4/36

• 1/9

• 8/20

• 2/5

Why might the theoretical and experimental probabilities not be close in some experiments?

• Incorrect calculations

• Too many trials

• Not enough trials

• Faulty experiment design

How can theoretical and experimental probabilities be used?

• To conduct experiments only

• To replace theoretical with experimental probabilities

• To make predictions about future events

• To calculate exact outcomes

What percentage of DVDs sold were comedies according to last year's sales?

• 29%

• 58%

• 20%

• 5000

What should the store owner do when buying DVDs for this year, based on last year's sales trend?

• Make 29% of them comedies

• Ignore last year's trend

• Buy more comedy DVDs

• Only stock comedies