Casio fx-991ZA PLUS II User Manual

Distr Sub-menu ( (STAT/DIST) (Distr))
(P()
This menu can be used to calculate the
probability of standard normal distribution.
• For details see "Performing Normal
Distribution Calculations".
(Q()
(R()
( t)
MinMax Sub-menu ( (STAT/DIST) (MinMax))
Select this menu
item:
When you want to obtain this:
(minX) Minimum value
(maxX) Maximum value
(Q1) First quartile
(med) Median
(Q3) Third quartile
Commands when Linear Regression Calculation (A+BX) Is Selected
Sum Sub-menu ( (STAT/DIST) (Sum))
Select this menu
item:
When you want to obtain this:
(∑x
2
)
Sum of squares of the X-data
(∑x)
Sum of the X-data
(∑y
2
)
Sum of squares of the Y-data
(∑y)
Sum of the Y-data
(∑xy)
Sum of products of the X-data and Y-data
(∑x
3
)
Sum of cubes of the X-data
(∑x
2
y)
Sum of (X-data squares × Y-data)
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Casio fx-991ZA PLUS II Specifications

General

Type	Scientific Calculator
Number of Functions	552
Equation Solver	Yes
Matrix Calculations	Yes
Complex Number Calculations	Yes
Integration	Yes
Differentiation	Yes
Memory	9 variables
Weight	95 g
Protective Case	Yes
Display	Natural Textbook Display
Power Source	Solar and Battery