WORKING WITH THE TI83
We
will be using the following statistical features of the TI83:
STAT When you press the STAT button, you are then given three different options: EDIT, CALC, and TESTS. 1. EDIT Use this option to access LISTS (similar to a spreadsheet) to create a new list of data or edit an existing list of data. There are six default columns, labeled L1, L2..,L6. To enter data in a list: Choose STAT → EDIT Press ENTER And select the list you want to use. Type the entries in the list, following each value with ENTER To create a new list , in addition to the 6 default lists, between L1 and L2, Choose STAT → EDIT Press ENTER Put the cursor at the title of list L2 Press 2^{nd} → INS A new column will be added to the left of L2. Use the ALPHA(green) key and alphabet keys to label the new list (for ex. BCCLIST) To delete the BCCLIST list, Put the cursor at the title of list BCCLIST Press DEL To access a list of names : Use 2^{nd} → LIST To sort the data in a given list in ascending(increasing) order, Choose STAT → EDIT → SortA( Press ENTER To access a list of names : Use 2^{nd} → LIST …in our case…BCCLIST Enter the right parenthesis ) .. Press ENTER To sort the data in a given list in descending(decreasing) order, Choose STAT → EDIT → SortD( Press ENTER To access a list of names : Use 2^{nd} → LIST …in our case…BCCLIST Enter the right parenthesis .. Press ENTER To Clear a list, say, BCCLIST Choose STAT → EDIT → ClrList Press ENTER To access a list of names : Use 2^{nd} → LIST …in our case…BCCLIST Press ENTER 2.CALC Use this option to get one or two variable summary statistics, the correlation coefficient, linear regression coefficients (slope and yintercept), and regression using transformed variables. 1:1Var Stats: Use this option to compute summary statistics for onevariable (univariate) data. It gives the number of observations(n), mean(X), sum(Σ X), sum of squares (Σ X^{2}), sample standard deviation (S_{x}), population standard deviation (σ), median(m), quartiles (Q_{1} and Q_{3}), minimum, and maximum. 2:2Var Stats: Use this option to compute summary statistics for bivariate data. It gives the number of pairs of observations (n), mean(X, Y), sum(ΣX , ΣY), sum of squares (Σ X^{2 }, ΣY^{2}), sample standard deviation (S_{x}, S_{y}), population standard deviation (σ_{x} , σ_{y}), min and max for each variable, and sum of products (ΣXY). 8:LinReg(a+bx): Use this option to get the correlation coefficient and least squares estimates for slope and yintercept for linear regression. 9:LnReg: Use this option for logarithmic transformation to linearize a regression model. ExpReg: Use this option for exponential transformation to linearize a regression model. PwrReg: Use this option for fitting a power model using logarithmic transformation to linearize a regression model. 3.TESTS We will talk about these options after we have learnt about Statistical Inference. STAT PLOT: Use this option to make a scatterplot, boxplot, histogram, regression line plot, and residual plot.
MAKING A HISTOGRAM USING THE ENTIRE DATA SET:
MAKING A BOXPLOT USING THE ENTIRE DATA SET:
PARAMETERS OF A DISTRIBUTION OF UNIVARIATE(one variable!) DATA Choose STAT → CALC Press ENTER Press 2^{nd} → LIST Select the list with the data Press ENTER WORKING WITH BIVARIATE (two variables!) DATA: TO MAKE A SCATTERPLOT:
TO COMPUTE THE CORRELATION COEFFICIENT:
TO GET SUMMARY STATISTICS FOR BIVARIATE( two variables!!) DATA
TO CALCULATE RESIDUALS:
TO TRANSFORM DATA 1. Create a new list with a name associated with the transformation.for ex. LnList. 2. Put the cursor at the title of list LnList 3. Enter the function you want to use, for ex. LnList(ListB),… 4. Press ENTER 5. To sketch the graph, repeat the operations to create a scatterplot.
WORKING WITH RANDOM NUMBERS To work with the random generator randInt, follow these instructions:
