62
Chapter 4: Statistical Calculations
The following statistics can be obtained for each statistical calculation (refer
to the table below):
• Use
I
key to perform a STAT variable calculation.
Single-variable statistical calculation
Statistics of
1
and value of the normal probability function
Linear regression calculation
Statistics of
1
and
2
(except coefficients
c
) and, in addition, estimate of
y
for a given
x
(estimate
y
´
) and estimate of
x
for a given
y
(estimate
x
´
)
Exponential regression, logarithmic regression, power
regression, and inverse regression calculation
Statistics of
1
and
2
(except coefficients
c
). In addition, estimate of
y
for a
given
x
(estimate
y
´
) and estimate of
x
for a given
y
(estimate
x
´
). (Since the
calculator converts each formula into a linear regression formula before
actual calculation takes place, it obtains all statistics, except coefficients
a
and
b
, from converted data rather than entered data.)
I
0 0
I
0 1
I
0 2
I
0 3
I
0 4
I
0 5
I
0 6
I
0 7
I
0 8
I
0 9
I
0 A
I
0 B
I
2 0
I
2 1
I
2 2
I
2 3
Q
n
Number of samples
¯y
Mean of samples (
y
data)
sy
Sample standard deviation (
y
data)
W
r
Correlation coefficient
a
Coefficient of regression equation
b
Coefficient of regression equation
c
Coefficient of quadratic regression equation
Population standard deviation (
y
data)
σ
¯x
Mean of samples (
x
data)
sx
Sample standard deviation (
x
data)
Population standard deviation (
x
data)
x
σ
Sum of samples (
x
data)
x
Σ
x
2
Sum of squares of samples (
x
data)
Σ
y
Sum of samples (
y
data)
y
2
Sum of squares of samples (
y
data)
x y
Sum of products of samples (
x
,
y
)
Σ
y
Σ
Σ
Variables
Contents
Key operations
Summary of Contents for EL-5230
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