Data Analysis on the TI-86

 

A. To enter data.

            1) Press 2nd, STAT, EDIT.

2) If data is already present, use arrow to move up to xStat and press CLEAR, ENTER.  (Continue for all lists that need to be cleared.)

3) Go to the space under xStat and type in the first x-value and hit ENTER.  Continue until all x-values are in xStat.  Repeat this procedure for yStat with corresponding y-values then press EXIT.

 

Another way to do this: (More than one way to do math!)

1) Press 2nd, LIST, { then type in the x-values making sure to use a comma between each entry, press }, STO, NAMES, xStat,  ENTER.  This inputs the x-values into xStat.  Press 2nd, { then type in the y-values making sure to use a comma between each entry, press }, STO, NAMES, yStat, ENTER.  This inputs the y-values into ystat.

 

B.  To set-up a scatterplot.

1) Press 2nd, STAT, PLOT, PLOT1, ENTER, scroll over to the On and make sure that it is highlighted by arrowing over and pressing ENTER.  Choose the correct type of graph that is wanted from the F1, F2, F3, F4,  or F5.  Make sure that the following are selected: Xlist: xStat and Ylist: yStat and chose the mark that is desired from F1, F2 or F3 then press EXIT. 

 

C. To plot the data.

                        1) Go to GRAPH, y(x)=,  and clear or turn off all equations.  Use the SELCT key so that the = is not bold.

                        2) Press GRAPH, ZOOM, MORE, ZDATA.

 

            D. To find the equation of the regression equation. 

1) Linear Regression (y = a + bx):  Press 2nd, STAT, CALC, LinR, 2nd, LIST, NAMES , xStat, , , yStat.  To compute the linear regression and put it directly into the graph for Y1: Press Press 2nd, STAT, CALC, LinR, 2nd, LIST, NAMES , xStat, , , yStat, , , 2nd, ALPHA, Y, 1, ENTER.

2) Quadratic Regression ():  Press 2nd, STAT, CALC, MORE, P2Reg, 2nd, LIST, NAMES , xStat, , , yStat.  To compute the linear regression and put it directly into the graph for Y1: Press Press 2nd, STAT, CALC, MORE, P2Reg, 2nd, LIST, NAMES , xStat, , , yStat, , , 2nd, ALPHA, Y, 1, ENTER.

3) Cubic Regression ():  Press 2nd, STAT, CALC, MORE, P3Reg, 2nd, LIST, NAMES , xStat, , , yStat.  To compute the linear regression and put it directly into the graph for Y1: Press Press 2nd, STAT, CALC, MORE, P3Reg, 2nd, LIST, NAMES , xStat, , , yStat, , , 2nd, ALPHA, Y, 1, ENTER.

4) Quartic Regression ():  Press 2nd, STAT, CALC, MORE, MORE, P4Reg, 2nd, LIST, NAMES , xStat, , , yStat.  To compute the linear regression and put it directly into the graph for Y1: Press Press 2nd, STAT, CALC, MORE, MORE, P4Reg, 2nd, LIST, NAMES , xStat, , , yStat, , , 2nd, ALPHA, Y, 1, ENTER.

5) Logarithmic Regression (y = a + b ln x):  Press 2nd, STAT, CALC, LnR, 2nd, LIST, NAMES , xStat, , , yStat.  To compute the linear regression and put it directly into the graph for Y1: Press Press 2nd, STAT, CALC, LnR, 2nd, LIST, NAMES , xStat, , , yStat, , , 2nd, ALPHA, Y, 1, ENTER.

6) Exponential Regression ():  Press 2nd, STAT, CALC, ExpR, 2nd, LIST, NAMES , xStat, , , yStat.  To compute the linear regression and put it directly into the graph for Y1: Press Press 2nd, STAT, CALC, ExpR, 2nd, LIST, NAMES , xStat, , , yStat, , , 2nd, ALPHA, Y, 1, ENTER.

 

 

            E. To find other values of the regression equation.

                        1) Press TABLE, TBLSET, set the table with the appropriate settings (think if the values should be produced automatically or if specific values are wanted), press, TABLE.