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Access the list of equations.
Select each equal sign (=).
Access the list of equations.
Use the arrow keys to navigate to the right of each equal sign (=) and clear them.
Access the ZOOM menu.
Select
<9:ZoomStat>
.
Access graphing mode.
,
[STAT PLOT]
Select
<1:Plot 1>
to access the first graph.
Use the arrows to select
<ON>
and turn on Plot 1.
Use the arrows to select the box plot picture and enable it.
<Xlist>
.If "L1" is not selected, select it.
,
[L1]
,
<Freq>
.Indicate that the frequencies are in
[L2]
.
,
[L2]
,
Go back to access other graphs.
,
[STAT PLOT]
View the box plot.
,
[STAT PLOT]
The following data is real. The percent of declared ethnic minority students at De Anza College for selected years from 1970–1995 was:
Year | Student Ethnic Minority Percentage |
---|---|
1970 | 14.13 |
1973 | 12.27 |
1976 | 14.08 |
1979 | 18.16 |
1982 | 27.64 |
1983 | 28.72 |
1986 | 31.86 |
1989 | 33.14 |
1992 | 45.37 |
1995 | 53.1 |
The TI-83 has a built-in linear regression feature, which allows the data to be edited.The
x -values will be in
[L1]
; the
y -values in
[L2]
.
ON Turns calculator on.
Access graphing mode.
,
[STAT PLOT]
Turn off all plots.
,
Access the mode menu.
,
[STAT PLOT]
Navigate to
<Float>
and then to the right to
<3>
.
All numbers will be rounded to three decimal places until changed.
Enter statistics mode and clear lists
[L1]
and
[L2]
, as describe previously.
,
Enter editing mode to insert values for
x and
y .
,
Access the catalog.
,
[CATALOG]
Arrow down and select
<DiagnosticOn>
... ,
,
Access linear regression.
Select the form of
y =
a +
bx .
,
The display will show:
This means the Line of Best Fit (Least Squares Line) is:
Access graphing mode.
,
[STAT PLOT]
Select
<1:plot 1>
To access plotting - first graph.
Navigate and select
<ON>
to turn on Plot 1.
<ON>
Select the scatter plot.
<Xlist>
.[L1]
is not selected, press
,
[L1]
to select it.Confirm that the data values are in
[L1]
.
<ON>
<Ylist>
.Select that the frequencies are in
[L2]
.
,
[L2]
,
Go back to access other graphs.
,
[STAT PLOT]
Notification Switch
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