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Statistics Programs 16-21
Flags Used:
None.
Program Instructions:
1. Key in the program routines; press
when done.
2. Press S to start entering new data.
3. Key in x
i
–value (data point) and press .
4. Key in f
i
–value (frequency) and press .
5. Press
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 (x
i
or f
i
) after you have
pressed
in step 4, press U and then press again.
Then go back to step 3 to enter the correct data.
7. When the last data pair has been input, press
G to calculate
and display the grouped standard deviation.
8. Press to display the weighted mean of the grouped data.
9. To add additional data points, press and continue at step 3.
To start a new problem, start at step 2.Variables Used:
Example:
Enter the following data and calculate the grouped standard deviation.
X Data point.
F Data–point frequency.
N Data–pair counter.
S Grouped standard deviation.
M Weighted mean.
i Index variable used to indirectly address the correct
statistics register.
Register -27 Summation Σf
i
.
Register -28 Summation Σx
i
f
i
.
Register -30
Summation Σx
i
2
f
i
.