Casio fx 991MS User Guide - Page 34

Regression Coefficient A = -35.59856934 Regression Coefficient B = 1.495939413 A X r r 1 = A X r r 2 = Regression Coefficient C = - 6.71629667 i10 -3 A X r r 3 = n when xi is 16 = -13.38291067 16 A X r r r 3 = m1 when yi is 20 = 47.14556728 20 A X r r r 1 = m2 when yi is 20 = 175.5872105 20 A X r r r 2 = Data Input Precautions • S S inputs the same data twice. • You can also input multiple entries of the same data us- ing A G. To input the data "20 and 30" five times, for example, press 20 P 30 A G 5 S. • The above results can be obtained in any order, and not necessarily that shown above. • Precautions when editing data input for standard devia- tion also apply for regression calculations. Technical Information k When you have a problem...... If calculation results are not what you expect or if an error occurs, perform the following steps. 1. Press A B 2(Mode) = to initialize all modes and settings. 2. Check the formula you are working with to confirm it is correct. 3. Enter the correct mode and try performing the calculation again. If the above steps do not correct the problem, press the 5 key.The calculator performs a self-check operation and deletes all data stored in memory if any abnormality is detected. Make sure you always keep written copies of all important data. k Error Messages The calculator is locked up while an error message is on 32