Linreg(Ax+B) - V ! 5 - Texas Instruments TI-73 Explorer Manual Book

142
Chapter 7: Statistical Analyses
5. View the line on the Graph
screen.
(
6. View the equation stored to
, if desired.
Y
2
&

LinReg(ax+b) - v ! 5 5

LinReg(ax+b)
LinReg(ax+b)
to the data using a least-squares fit. It displays the value for
(slope) and
displays values for
(correlation coefficient). The
(-|).You can execute
CATALOG
Graph screen, Home screen, or the Program editor.
It is also helpful to compare the slope of the line you draw
with
Manual-Fit
with the
LinReg(ax+b)
From the Home screen or the Program editor,
accepts four optional arguments. Enter up to two list names,
XList and YList; a frequency list, freq; and an equation
variable, Yn. freq is the frequency of occurrence for each
corresponding data point in XList and YList. If freq is omitted,
all values are used once. If XList and YList are not specified,
the default list names are
press - }
LinReg(ax+b)
7
(linear regression) fits the model equation
(y-intercept); when
b
(coefficient of determination) and
2
r
to the slope of the line the calculator calculates
command.
L
.
2:Y-Vars
[XList,YList,freq,Yn]
DiagnosticOn
DiagnosticOn
LinReg(ax+b)
and . To access
L
1 2
The Manual-Fit line,
Y (previous section).
1
The Med-Med
line
Y and Y
3 4
may vary.
y=ax+b
is set, it also
r
command is in the
from the
LinReg(ax+b)
variables,
Y
n
a