Obtaining statistical values from input data, E-18 – Casio fx-92B Collège 2D+ User Manual
Page 19
E-18
Obtaining Statistical Values from Input Data
To obtain statistical values, press
while in the Stat Editor and then
recall the statistical variable (
S
x
,
3
x
2
, etc.) you want. Supported statistical
variables and the keys you should press to recall them are shown below.
For single-variable statistical calculations, the variables marked with an
asterisk (*) are available.
Sum:
3
x
2
*,
3
x
*,
3
y
2
,
3
y
,
3
xy
,
3
x
3
,
3
x
2
y
,
3
x
4
(STAT) (Sum) to
Number of Items:
n
*, Mean:
M
*,
N
, Population Standard Deviation:
S
x
*,
S
y
, Sample Standard Deviation: s
x
*, s
y
(STAT) (Var) to
Minimum Value: minX*, minY, Maximum Value: maxX*, maxY
(STAT) (MinMax) to
(When the single-variable statistical calculation is selected)
(STAT) (MinMax) to
(When a paired-variable statistical calculation is selected)
Regression Coefficients for linear regression (
y
= A
x
+ B): A, B,
Correlation Coefficient:
r
, Estimated Values:
K
,
L
(STAT) (Reg) to
•
K
, and
L
are not variables. They are commands of the type that take an
argument immediately before them. See “Calculating Estimated Values”
for more information.
To input the single-variable data
x
= {1, 2, 2, 3, 3, 3, 4, 4, 5}, using
the FREQ column to specify the number of repeats for each items
({
x
n
; freq
n
} = {1;1, 2;2, 3;3, 4;2, 5;1}), and calculate the mean and
population standard deviation.
(SETUP)A(STAT)(ON)
(STAT)(1-VAR)
1
2 3 4 5 AC
1
2 3 2
(STAT)(Var)(M)
(STAT)(Var)(S
x
)
Results: Mean: 3 Population Standard Deviation: 1.154700538
To calculate the linear regression and logarithmic regression
correlation coefficients for the following paired-variable data and
determine the regression formula for the strongest correlation: (
x
,
y
) = (20, 3150), (110, 7310), (200, 8800), (290, 9310). Specify Fix
3 (three decimal places) for results.
(SETUP)A(STAT)(OFF)
(SETUP)(Fix)
(STAT)(AX + B)
20
110 200 290 AC
3150
7310 8800 9310
(STAT)(Reg)(r)
2
2
STAT
STAT
3
3
STAT
FIX
STAT
FIX