Data Analysis on the TI-83 and TI-84
A. To enter data.
1) Press STAT, ENTER.
2) If data is already present, use arrow to move up to L1 and press CLEAR, ENTER. (Continue for all lists that need to be cleared.)
3) Go to the space under L1 and type in the first x-value and hit ENTER. Continue until all x-values are in L1. Repeat this procedure for L2 with corresponding y-values.
Another way to do this: (More than one way to do math!)
1) Press 2nd, { then type in the x-values making sure to use a comma between each entry, press }, STO, 2nd, L1, ENTER. This inputs the x-values into L1. Press 2nd, { then type in the y-values making sure to use a comma between each entry, press }, STO, 2nd, L2, ENTER. This inputs the y-values into L2.
B. To set-up a scatterplot.
1) Press 2nd, STATPLOT, ENTER, scroll over to the On and make sure that it is highlighted by arrowing over and pressing ENTER. Arrow down to find the correct type of graph that is wanted. Make sure that the following are selected: Xlist:L1 and Ylist:L2 and chose the mark that is desired.
C. To plot the data.
1) Go to Y= and clear or turn off all equations.
2) Press ZOOM, 9:ZoomStat.
D. To find the equation of the regression equation. To turn on the r values press 2nd, CATALOG, arrow down to DiagnosticOn and press ENTER.
1) Linear Regression (y = a + bx): Press STAT, arrow over to CALC, 8:LinReg(a+bx), 2nd, L1, , , 2nd, L2. To compute the linear regression and put it directly into the graph for Y1: Press STAT, arrow over to CALC, 8:LinReg(a+bx), 2nd, L1, , , 2nd, L2, , ,VARS, Y-VARS, 1:Function, ENTER, 1:Y1, ENTER.
2) Quadratic
Regression (
): Press STAT, arrow over to CALC, 5:QuadReg,
2nd, L1, , , 2nd, L2.
To compute the linear regression and put it directly into the graph for
Y1: Press STAT, arrow over to CALC, 5:QuadReg, 2nd,
L1, , , 2nd, L2, , ,VARS,
Y-VARS, 1:Function, ENTER, 1:Y1, ENTER.
3) Cubic Regression
(
): Press STAT, arrow over to CALC,
6:CubicReg, 2nd, L1, , , 2nd,
L2. To compute the linear regression and put it directly into the graph
for Y1: Press STAT, arrow over to CALC, 6:CubicReg,
2nd, L1, , , 2nd, L2,
, ,VARS, Y-VARS, 1:Function, ENTER, 1:Y1,
ENTER.
4) Quartic
Regression (
):Press STAT, arrow over to CALC, 7:QuartReg,
2nd, L1, , , 2nd, L2.
To compute the linear regression and put it directly into the graph for
Y1: Press STAT, arrow over to CALC, 7:QuartReg, 2nd,
L1, , , 2nd, L2, , ,VARS,
Y-VARS, 1:Function, ENTER, 1:Y1, ENTER.
5) Logarithmic Regression (y = a + b ln x): Press STAT, arrow over to CALC, 9:LnReg, 2nd, L1, , , 2nd, L2. To compute the linear regression and put it directly into the graph for Y1: Press STAT, arrow over to CALC, 9:LnReg, 2nd, L1, , , 2nd, L2, , ,VARS, Y-VARS, 1:Function, ENTER, 1:Y1, ENTER.
6) Exponential
Regression (
): Press STAT, arrow over to CALC, 0:ExpReg,
2nd, L1, , , 2nd, L2.
To compute the linear regression and put it directly into the graph for
Y1: Press STAT, arrow over to CALC, 0:ExpReg, 2nd,
L1, , , 2nd, L2, , ,VARS,
Y-VARS, 1:Function, ENTER, 1:Y1, ENTER.
E. Another way to plot the graph of the regression equation. (More than one way to do math!)
1) Press Y=, VARS, 5:Statistics, arrow over to EQ then press 1:RegEQ, GRAPH.
F. To find other values of the regression equation.
1) Press 2nd, TBLSET, set the table with the appropriate settings (think if the values should be produced automatically or if specific values are wanted), press, 2nd, TABLE.