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2-2 Math, Angle, and Test Operations
8302MATH.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:12 PM Printed: 02/19/01 2:27
PM Page 2 of 26
Getting Started is a fast-paced introduction. Read the chapter for details.
Suppose you want to model flipping a fair coin 10 times. You want to track
how many of those 10 coin flips result in heads. You want to perform this
simulation 40 times. With a fair coin, the probability of a coin flip resulting in
heads is 0.5 and the probability of a coin flip resulting in tails is 0.5.
1. Begin on the home screen. Press
|
to
display the
MATH PRB
menu. Press 7 to
select
7:randBin( (random Binomial).
randBin( is pasted to the home screen. Press
10 to enter the number of coin flips. Press
¢
. Press
Ë
5 to enter the probability of
heads. Press
¢
. Press
40 to enter the
number of simulations. Press
¤
.
2. Press
Í
to evaluate the expression. A
list of 40 elements is displayed. The list
contains the count of heads resulting from
each set of 10 coin flips. The list has 40
elements because this simulation was
performed 40 times. In this example, the
coin came up heads five times in the first
set of 10 coin flips, five times in the second
set of 10 coin flips, and so on.
3. Press
¿
y
ã
L1ä
Í
to store the data
to the list name
L
1
. You then can use the
data for another activity, such as plotting a
histogram (Chapter 12).
4. Press
~
or
|
to view the additional counts
in the list. Ellipses (
...) indicate that the list
continues beyond the screen.
Note:
Since
randBin(
generates random
numbers, your list elements may differ from those
in the example.
Getting Started: Coin Flip