Casio fx-9860GII - Page 48

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
Enter the values 0,1,2,3,4,5,6,7 in List1. Press
EXE
after each number.
Press
F5
DIST |
F5
BINM |
F1
Bpd.
Press
F1
List.
Choose List1.
Enter the number of trials, 7 and the probability 0.3.
Press
EXE
.
The calculator displays each of the probabilities.
To see the remaining values scroll the screen down.
Note: the fi gures on the left refer to the positions of the values in the list,
not the values themselves.
Example 54
X is a discrete random variable and X ~ Bin(20, 0.45).
Calculate
a the probability that X is less than or equal to 10.
b the probability that X lies between 5 and 15 inclusive.
c the probability that X is greater than 11.
Press
MENU
. You will see the dialog box as shown on the right.
Choose 2: STAT and press
EXE
.
Press
F5
DIST |
F5
BINM |
F2
Bcd.
a Enter the x-value 5, the number of trials, 9 and the probability 0.75.
Press
EXE
.
P (X ≤ 10) = 0.751 (to 3 sf )
You are given the lower
bound probability so you
have to calculate other
probabilities using this.
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