Casio fx-991EX User Manual

fx-991EX Quick Start Guide 27
Press p one more time to calculate the probability
distribution table.
Notice how the small probabilities are expressed in proper
scientic notation!
INVERSE NORMAL
To calculate an Inverse Normal Distribution, press
i1(Select Type).
(“Editor” edits the previous PD’s data list.)
Select 3(Inverse Normal).
Input the values as shown to answer the question: “If the heights
of U.S. males are normally distributed with a mean of 70 inches
and a standard deviation of 4 inches, what range denes the
tallest 10% of U.S. males?”
Press p once more to reveal the result. To be in the top 10%
of U.S. males by height, a man must be over 75 inches (6’3”) tall.
DISTRIBUTION

Casio fx-991EX Specifications

General

Type	Scientific
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black, White
Battery type	LR44
Power source	Battery/Solar
Number of batteries supported	1
Digits	16 digits
Display type	LCD
Display resolution	192 x 63 pixels
Display number of lines	2 lines
Display number of characters	16
Storage media type	-
Operation	552
Conversion between	Decimal, Fraction, Percent
Convert angles from degrees to	Gradian, Radian
Random number/integer generator	Yes

Weight and Dimensions

Depth	165.5 mm
Width	77 mm
Height	11.1 mm
Weight	90 g