Casio fx-9860GII User Manual

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
P(X < 190) = 0.401 (to 3 sf)
b P(x > 194)
Press
EXIT
to return to the entry screen.
Enter Lower Bound as 194, Upper Bound as 1E99,
σ as 20 and μ as 195.
P(X > 194) = 0.520 (to 3 sf)
c P(187 < x < 196)
Press
EXIT
to return to the entry screen.
Enter Lower Bound as 187, Upper Bound as 196,
μ as 195 and σ as 20.
P(187 < X < 196) = 0.175 (to 3 sf)
5.15 Calculating X-values from normal probabilities
In some problems you are given probabilities and have to calculate the associated
values of X. To do this, use the Inverse Normal function.
When using the Inverse Normal function,
make sure you fi nd the probability on the
correct side of the normal curve. If the area is
the lower tail, that is it is in the form P(X < x),
use ‘Left’ tail.
If you are given the upper tail P(X > x), you
should use ‘Right’ tail.
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Casio fx-9860GII Specifications

General

Type	Graphing
Form factor	Desktop
Control type	Buttons
Product color	Silver
Housing material	Plastic
Built-in capability	Yes
Digits	- digits
Display type	LCD
Second display	No
Display tilting	-
Display resolution	64 x 128 pixels
Display character size	8 x 21 mm
Display number of lines	8 lines
Display number of characters	21
Flash memory	1.5 MB
RAM capacity	0.064 MB
Storage media type	Flash
Battery type	AAA
Power source	Battery
Number of batteries supported	4