Finding Random Numbers on a TI − 83, 83+, 84+ Calculator
TI − 83, 83+, 84+: Entering Data into the statistics list editor
ENTER after each data value
after you have entered data, checked it and corrected errors.
TI − 83, 83+, 84+: Sorting Data
( 2 The calculator responds DONE ^{n d} L1 )
for all TI Graphing Calculators When you put data into the lists there are two methods to handle repeated values. Example: Suppose your data is 1, 4, 4, 4, 5, 7, 8, 8.
TI − 83, 83+, 84+: One Variable Statistics
If data is in a different list indicate the appropriate listname instead of L1
Interpreting The Output For One Variable Statistics
TI − 83, 83+, 84+: Graphing Univariate (One Variable) Data Histogram using the TI − 83, 83+, 84+: 2nd STATPLOT 1 Highlight " ENTER
To select Type: Highlight histogram icon press
To set Xlist:
To set Freq:
To specify your own histogram intervals, adjust the window: WINDOW Example: For intervals 15−19, 20−24, 25−29, . . ., 60−64, 65−69: Xmin = 14.5 Xmax=69.5 Xscl=5 Estimate
The screen indicates the frequency (height) for the bar that the cursor is positioned on. Boxplot using the TI − 83, 83+, 84+: 2nd STATPLOT 1 Highlight " ENTER
To select Type: Highlight boxplot icon press
To set Xlist:
To set Freq:
(min, Q1, median, Q3, max). The screen will indicate the appropriate numerical value.
DIMENSION ERROR message If you get a dimension error, you probably have one of two types of errors. One of these methods will usually eliminate a dimension error: You may be trying to do something with two lists that are supposed to be the same length but for some reason are not. Check that you have the correct information in each list or that you are using the correct lists. Check to be sure that your list is not empty. You may be trying to graph an equation in your equation editor at the same time as you are trying to graph at STATPLOT. If you want to graph the equation, turn your statplots off. If you want to draw the statplot, go into the Y= equation editor and turn off or delete the functions that are stored in Y1, Y2, . . .
Binomial, Geometric, Poisson Distributions on the TI − 83, 83+, 84+, 86, 89: TI-83 and 84, press 2 TI-86 press 2 ( TI-89 press APPS; pPress 1: FlashApps; highlight Stats/List Editor press ENTER F5: Distr
pdf stands for cdf stands for Binomial Distribution
Geometric Distribution
Poisson Distribution
Linear Regression and Correlation: Drawing a Scatterplot on the TI − 83, 83+, 84+ in a window sized to show the data TI − 83, 83+, 84+: 2 On Off Type
Xlist:
Ylist:
Mark: ZOOM 9:ZoomStat You can use TRACE and the right and left cursor arrow keys to jump between the data points and show their (x,y) values To show the linear regression line, type the equation of the line into function Y1 in the Y= function editor.
a and b in the equation. You can enter X using the X,t,q
,n key
Setting up your TI – 83 & 84: 2 With the cursor pointing to Diagnostics on press Enter When Diagnostics On is pasted to your home screen, press Enter again You should only need to do this once. After you have turned Diagnostics ON it should stay on unless you turn it off, reset your memory, or your batteries and the backup battery both go dead.
Linear Regression Using the TI − 83, 83+, 84+: Linear Regression t test
Xlist:
Ylist:
Freq: 1 b & r : ¹ 0 <0 >0 RegEQ:
Calculate ENTER OUTPUT of Linear Regression t test
Linear Regression and Correlation: Identifying Outliers in Bivariate Data graphically using the TI calculators Perform the linear regression using the Linear Regression T Test Function Write down the value of the Standard Error s, the slope b and the y-intercept a Go to the Y= equation editor. Type the linear regression equation into equation Y1: Y1 = a + bX, using the appropriate values for a and b in the equation. You can enter X using the X,t,q ,n key Enter two new equations: Y2 = a + bX − 2 * s and Y3 = a + bX + 2 * s using the appropriate values of a, b, and the standard error s in the equations Draw the graph: press ZOOM 9:ZoomStat An outlier is any point for which the data value is more than two standard errors away from the linear regression line. Any points that lie above the top line or below the bottom line are outliers, being more than two standard errors away from the regression line. Any points that lie between the lines are NOT outliers. Use TRACE and the right and left arrow keys to identify which are the points that are the outliers and to find the x and y values for these data points.
Test of Independence for TI-83, 83+, 84+ - Access MATRIX menu to input data to matrix A:
- Enter matrix dimensions:
- Enter table values going across rows
- Run program to do Chi Test
- To see the expected values matrix
TI83 : MATRIX EDIT ENTER TI83+ & 84+ : 2 Type: # rows ENTER # columns ENTER Press ENTER after each value. When done, press EXIT. TI83, 83+ & 84+ STAT TESTS C: -TEST Make sure Observed says A and Expected says B. Press CALC or Calculate You will see the test statistic and p-value on the screen.
TI83, 83+ & 84+ MATRIX 2 ENTER
There is a bug in the calculator program for chi test using DRAW. Sometimes it shades the graph in the wrong direction. A chi test for independence is always a one tailed test to the right (because you are testing whether the chi square test statistic is a large number, indicating large differences between observed and expected). If you have the calculator draw, it may shade to the right correctly, or it may incorrectly shade to the left instead. The direction of the shading appears to be related to the direction of the last z, t, or proportion hypothesis test that was done on the calculator. If the last test of a mean or a proportion was two tailed or right tailed, it seems to shade to the right, correctly. If the last test of a mean or a proportion was left tailed, it incorrectly shades left instead of right. |