Casio fx-9860GII - 5.12 Calculating binomial probabilities

Using a graphic display calculator
© Oxford University Press 2012: this may be reproduced for class use solely for the purchaser’s institute
Casio fx-9860GII
5.12 Calculating binomial probabilities
Example 52
X is a discrete random variable and X ~ Bin(9, 0.75).
Calculate P(X = 5)
P X ==
()
⎛
⎝
⎜
⎞
⎠
⎟
5
9
5
075 025
54
..
The calculator can fi nd this value directly.
Press
MENU
. You will see the dialog box as shown on the right.
Choose 2: STAT and press
EXE
.
Press
F5
DIST |
F5
BINM |
F1
Bpd.
Enter the x-value 5, the number of trials, 9 and the probability 0.75.
Press
EXE
.
The calculator shows that P (X = 5) = 0.117 (to 3 sf ).
Example 53
X is a discrete random variable and X ~ Bin(7, 0.3).
Calculate the probabilities that X takes the values {0, 1, 2, 3, 4, 5, 6, 7}.
Press
MENU
. You will see the dialog box as shown on the right.
Choose 2: STAT and press
EXE
.
Press
F5
DIST |
F5
BINM |
F1
Bpd.
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