HP F2216A hp 33s_user's manual_English_E_HDPM20PIE56.pdf - Page 280
Program Instructions, Variables Used, To add additional data points, press
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Program Instructions: 1. Key in the program routines; press when done. 2. Press X S to start entering new data. 3. Key in xi -value (data point) and press g. 4. Key in fi -value (frequency) and press g. 5. Press g after VIEWing the number of points entered. 6. Repeat steps 3 through 5 for each data point. If you discover that you have made a data-entry error (xi or fi) after you have pressed g in step 4, press X U and then press g again. Then go back to step 3 to enter the correct data. 7. When the last data pair has been input, press X G to calculate and display the grouped standard deviation. 8. Press g to display the weighted mean of the grouped data. 9. To add additional data points, press g and continue at step 3. To start a new problem, start at step 2. Variables Used: X F N S M i Register 28 Register 29 Register 31 Data point. Data-point frequency. Data-pair counter. Grouped standard deviation. Weighted mean. Index variable used to indirectly address the correct statistics register. Summation Σfi. Summation Σxifi. Summation Σxi2fi. Example: Enter the following data and calculate the grouped standard deviation. 16-20 Statistics Programs