Chapter 2: Main Application
95
2-11
Using Probability
You can use Probability to simulate the following.
• The die faces that will appear when a single die is thrown a specified number of times (1 Die)
• The sum of the data of dice faces that will appear when a pair of dice is thrown a specified number of times (2
Dice +)
• The product of the data of dice faces that will appear when a pair of dice is thrown a specified number of
times (2 Dice
½
)
• When any number of balls labeled A, B, C, D, E, and F are placed into a box, data about how many times
each ball will be drawn within a specified number of draws (Container)
You can specify any integer from 1 to 20 as the number of die faces.
Probability dialog box
Probability window
(Trial information and result)
u
To start up Probability
1. On the work area window, tap the right most toolbar down arrow button.
2. On the icon palette that appears, tap
P
. This will display an initial Probability dialog box.
u
Probability window menus and buttons
• Clear the Probability window (and display the Probability dialog box) ......... File - New, Edit - Clear All or
O
• Display the Probability dialog box and try the probability emulation
(the trial result will be added to the end of the current file) ...............................................Edit - Add or
P
• Open or save a file ............................................................................................File - Open, File - Save or
{
• Delete the currently selected trial data ......................................................................................... Edit - Delete
• Show the selected result as a frequency distribution table (in matrix form) .................... Display - Distribution
• Show the selected result as sample data (in list form) ................................................. Display - Sample Data
0246
To obtain the sum data when a two six-sided die are thrown 50 times
0247
After putting 10 A-balls, 20 B-balls, and 30 C-balls into a box, determine how many times each type of
ball will be drawn when there is a total of 50 draws. Each time a ball is drawn, it should be replaced into
the box before the next draw.
Tip:
Under initial default settings, trial results are shown as a frequency distribution table in matrix form. Selecting
distribution table results and selecting [Sample Data] on the [Display] menu will change them to sample data in list
form. Conversely, selecting sample data results and selecting [Distribution] on the [Display] menu will change them to
distribution table results.
Distribution table (matrix form)
Sample data (list form)
