Sharp EL-5230 User Manual
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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