Getting Started: Coin Flip - Texas Instruments TI-82 STATS Manual Book

Getting Started: Coin Flip

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
(random Binomial).
7:randBin(
pasted to the home screen. Press
number of coin flips. Press ¢. Press Ë
enter the probability of heads. Press ¢. Press
to enter the number of simulations. Press ¤.
40
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
the list name . You then can use the data for
L
1
another activity, such as plotting a histogram
(Chapter 12).
4. Press ~ or | to view the additional counts in
the list. Ellipses (
continues beyond the screen.
Note: Since randBin( generates random
numbers, your list elements may differ from those
in the example.
2.2 Math, Angle, and Test Operations
menu. Press
7
randBin(
to enter the
10
ä Í to store the data to
L1
) indicate that the list
...
to select
is
to
5