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Casio fx-991ES PLUS User Manual

Casio fx-991ES PLUS
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menu that appears when you perform the following key operation:
(STAT) (Distr).
P, Q, R: These functions take the argument t and determine a probability
of standard normal distribution as illustrated below.
t: This function is preceded by the argument X, and determines the
normalized variate X
t =
X -
x
σx
.
Example 5: For the single variable data {x
n
; freq
n
} = {0;1, 1;2, 2;1, 3;2, 4;2,
5;2, 6;3, 7;4, 9;2, 10;1}, to determine the normalized variate (
t) when x =
3, and P(t) at that point up to three decimal places (Fix 3).
(SETUP) (STAT) (ON)
(SETUP) (Fix)
(STAT) (1-VAR)
0 1 2 3 4 5 6 7 9 10
1 2 1 2 2 2 3 4 2 1
3 (STAT) (Distr) ( t)
(STAT) (Distr) (P()
Normalized variate ( t): -0.762
P(t): 0.223
Base-n Calculations (BASE-N)
Press
(BASE-N) to enter the BASE-N Mode when you want to
perform calculations using decimal, hexadecimal, binary, and/or octal
values.
55

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Casio fx-991ES PLUS Specifications

General IconGeneral
TypeScientific
CoverNo
Form factorDesktop
Control typeButtons
Product colorGray
Digits15 digits
Display typeDot-matrix
Display resolution96 x 31 pixels
Display number of lines10 lines
Storage media typeNot available
Battery life3 year(s)
Battery typeLR44
Power sourceBattery/Solar
Number of batteries supported1
Symbolic notationSquare root
Conversion betweenDecimal, Fraction, Percent
Convert angles from degrees toGradian, Radian
Random number/integer generatorYes
Weight and Dimensions IconWeight and Dimensions
Depth162 mm
Width80 mm
Height11.1 mm
Weight95 g

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