Texas Instruments TI-73 Teachers Manual page 65

60
Using the TI-73: A Guide for Teachers
3. Compare the group experimental probabilities with the
theoretical probabilities from the tree diagram.
a. Go to and calculate the group probabilities by
L
3
dividing each entry in
trials (sum of
3 " $ to highlight
- v Z F - v " " J
- v Z E b
b. In enter the frequencies from the tree diagram.
L
4
(See screen at the right.)
" to the first line of
Enter the frequencies from the tree diagram. Press
b after each list item.
c. Then in
L
5
dividing the frequencies in
which is 32.
" $ to highlight
- v Q F - v " " J
- v Q E b
4. Compare the experimental probabilities in
theoretical probabilities in
Wrap-up for Part B
Have students write in their journals the difference
between experimental and theoretical probability.
Assessment Suggestion for Part B
Ask students: Suppose you toss 4 coins. How many
heads are most likely to occur? Explain.
Extensions
Find the probability of two equally likely events using
combinations in Pascal's Triangle.
Plot a histogram using the theoretical probabilities.
Draw a pie chart comparing frequencies to total
number of possible outcomes.
© 1998 T I
EXAS NSTRUMENTS
by the total number of
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3
).
L
2
(See screen at the right.)
L
3
L
4
, find the theoretical probabilities by
by the total of
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4
L
5
. (See screen at the right.)
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5
I
NCORPORATED
Counting the frequency of
,
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4
the points on the tree
diagram resulted in the
frequencies listed in
to the
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3
Probability
L .
4