Single-Variable Statistical Calculation; Linear Regression Calculation; Exponential Regression, Logarithmic Regression, Power Regression, And Inverse Regression Calculation - Sharp EL-5230 Operation Manual

Chapter 4: Statistical Calculations
The following statistics can be obtained for each statistical calculation (refer
to the table below):
Variables
n
¯ x
sx
Q
x σ
x
Σ
2
x
Σ
¯ y
sy
σ
y
y
Σ
2
y
Σ
W
x y
Σ
a
b
c
r
• 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.)
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Contents
Number of samples
Mean of samples ( x data)
Sample standard deviation (x data)
Population standard deviation ( x data)
Sum of samples ( x data)
Sum of squares of samples (x data)
Mean of samples ( y data)
Sample standard deviation (y data)
Population standard deviation ( y data)
Sum of samples ( y data)
Sum of squares of samples ( y data)
Sum of products of samples (x, y )
Coefficient of regression equation
Coefficient of regression equation
Coefficient of quadratic regression equation
Correlation coefficient
Key operations
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