Regression Models - Texas Instruments BA II PLUS User Manual

• When you enter data for one-variable statistics,
value and
Y
• When you enter a value for
Analyzing One-Variable Statistics
To analyze one-variable statistics, select
G , and G
are computed and displayed for one-variable statistics.
X X 2
Analyzing Two-Variable Statistics
You can choose from among these four regression-analysis methods:
• LIN
•
Ln
•
EXP
•
PWR
Computing Values Automatically
Except for the predicted
displays values for statistics variables automatically when you access
them.
Using X' and Y' for Regression Predictions
To use the and
X'
enter a value for

Regression Models

For two-variable data, the Statistics worksheet uses four regression
models for curve fitting and forecasting.
Model
LIN
Ln
EXP
PWR
The calculator interprets the
value as the dependent variable.
Y
The calculator computes the statistical results using these transformed
values:
• uses X and Y.
LIN
Statistics Worksheet
nn specifies the number of occurrences (frequency).
and
X'
variables for regression predictions, you either can
Y'
to compute
X'
Formula
Y = a + b X
Y = a + b ln(X)
Y = a b
x
Y = a X
b
value as the independent variable and the
X
nn, the value for
X
. Only values for
1-V
values, the calculator computes and
Y'
or enter a value for
Y'
Restrictions
None
All X values > zero
All Y values > zero
All X and Y values > zero
nn represents the
X
nn defaults to 1.
Y
, v v v v ,
n Sx
to compute
Y'
, s
,
X
.
X'
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