Texas Instruments TINSPIRE Teacher Software Guidebook - Page 584

Input C-Level RegEQ Description The confidence level for the interval instructions. Must be | 0 and < 100. If it is | 1, it is assumed to be given as a percent and is divided by 100. Default=0.95. The prompt for the name of the function where the calculated regression equation is to be stored. Statistical calculations Performing a statistical calculation You can perform statistical calculations to analyze data. The following example fits a y=mx+b linear regression model to two lists. 1. Select the column formula cell (second cell from the top) in column A. 2. From the Statistics menu, select Stat Calculation, and select Linear Regression (mx+b) to choose the regression model. The Linear Regression (mx+b) dialog box opens and displays fields for typing or selecting each argument. Because you selected a cell in advance, the column for X List is already filled in with the column letter of the list with a cell selected. 3. Press e to move to the Y List box and click the drop-down arrow to select a named list. 4. To store the regression equation in a specified variable, press e and replace Save RegEqn To with the name of the variable. 5. Press e as necessary to move to the 1st Result box and type c[] as the column letter for the first result column. 6. Select OK. Lists & Spreadsheet inserts two columns: one containing the names of the results, and one containing the corresponding values. 572 Using Lists & Spreadsheet