Teaching Algebra with Manipulatives

Chapter 14 Teaching Notes and Overview
what should happen. Whereas, experimental
probability is determined by using data from
tests or experiments.
Provide a paper bag for each group of two
students and 20 two-inch pieces of paper. Ask
the pairs to follow the steps to Collect the
Data on the worksheet. Then have them
complete Exercises 1–4. As soon as all pairs
have finished the activity, collect the data from
all groups. Examine the data as a class. Discuss
how having a larger set of data affects how
close the experimental probability is to the
theoretical probability.
Answers
1. See students’ work.
2. P(X) 20%, P(Y) 35%, P(Z) 45%
3. See students’ work.
4. It should closely resemble the theoretical
probability.
Algebra Activity
Recording Sheet
Simulations
(p. 209 of this booklet)
Use With the activity on page 783 in Lesson
14-5 of the Student Edition.
Objective Find experimental and theoretical
probabilities of rolling a given number on a die.
Materials
die
Students will roll a die 20 times and record
the results. They then list the experimental
probability of rolling each number. Students
then find the theoretical probability of rolling
given numbers and compare these results with
their experimental probabilities. Finally, they
draw conclusions based on the relationship
between the number of experiments in a
simulation and the experimental probability.
Algebra 1—Chapter 14
Answers
See Teacher Wraparound Edition p. 783.
© Glencoe/McGraw-Hill 205 Teaching Algebra with Manipulatives