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Obtaining statistical values from input data, E-18 – Casio fx-92B Collège 2D+ User Manual

Page 19

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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

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