Page 222 - Math Course 3 (Book 2)

Probability Simulations

Empirical Study
MO. 12 - L9b
A new study is being developed to analyze the
relationship between heart rate and watching scary Performing Probability
movies. A researcher performs three studies, each
with 100 volunteers. Based on similar studies, the Simulations
researcher expects that 80% of the subjects will
experience a significant increase in heart rate. The
table shows the results of the study.
Vocabulary A-Z
Let us learn some vocabulary

simulation
A simulation allows you to find an experimental
probability by using objects to act out an event that
would be difficult or impractical to perform.
Study of Heart Rate
Result Study 1 Study 2 Study 3
Expected Success 80% 80% 80%
Rate
Rate increased 83% 75% 78%
significantly
Little or no 16% 24% 19%
increase

Rate decreased 1% 1% 3%

What is the experimental probability that the movie
would cause a significant increase in heart rate for
all three studies?

A. 90% Let’s Begin
B. 79%
C. 80%
D. 60%
Simulation

Example

Answer
In the last 30 school days, Bobbie’s older brother
has given her a ride to school 5 times. What could
be used to simulate whether Bobbie’s brother will
give her a ride to school?
5
1
Bobbie got a ride to school on or days.
30 6

Since a die has 6 sides, you could
Answer use one side of a die to represent
a ride to school.

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