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3
Advanced Keyboard/STATISTICS USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
Steps for calculating numerical descriptions of a one-variable
non-weighted data set
1. Turn the calculator on and press STAT to enter the statistics menu.
Press A (EDIT) ENTER to view the statistics data entry screen.
If there is a data set present within the lists on your calculator, use the
arrow keys to move to the list, if necessary, and press ▲ to highlight the
list label. Press DEL ENTER to delete the old data. Repeat for other lists
of data.
2. Move the highlighter to the cell directly below the L1 in the table.
Enter the following data set:
25 32 28 33 31 27 40 38 29 30
3. Check the data you have entered and correct any errors you may find.
Press 2ndF QUIT to exit the data entry screen. To calculate the numerical
descriptions of the data set, press STAT C (CALC) and 1 (1_Stats).
Press ENTER and the statistical results will appear.
4. The statistics displayed are:
1. the average or mean value of the data set, ;
2. the standard deviation assuming the data set is a sample from a
population, sx;
3. the standard deviation assuming the data set represents the entire
population, σx;
4. the sum of the data values, ∑x;
5. the sum of the squared data values, ∑x
2
;
Press ▼ five times to see more of the statistics.
6. the number of values in the data set, n;
7. the minimum value in the data set, xmin;
8. the first quartile (25th percentile), Q1;
9. the median (50th percentile), Med;
10. the third quartile (75th percentile), Q3; and
Press ▼ one more time to see the final statistic.
11. the maximum value in the data set, xmax.
NUMERICAL DESCRIPTION OF A
ONE-VARIABLE DATA SET
x
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