Sharp EL-120 User Manual download pdf (Page 19)

Basic Keyboard/GENERAL MATHEMATICS USING THE SHARP EL-9900

Steps for calculating statistics for a two-variable data set

STEP 1: Turn the calculator on and press STAT to enter the statistics menu. Press

A (EDIT) ENTER to access the data entry screen. Delete old data

by highlighting L1 and pressing DEL ENTER . Repeat for other lists.

STEP 2: Enter the following data set:

25 32

28 33

31 27

40 38

29 30

STEP 3: Check the data you have entered and correct any errors you may find.

To calculate the numerical descriptions of the two variables, press 2ndF

QUIT STAT C (CALC) 2 2_Stats. Press ENTER and the statistical

results will appear.

STEP 4: Press ▼ to view the remaining statistics.

The statistics displayed are:

1. the average or mean value of the variable, or ;

2. the standard deviation assuming the data points are a sample from

a population, sx or sy;

3. the standard deviation assuming the data points represents the entire

population, σx or σy;

4. the sum of the values, ∑x or ∑y;

5. the sum of the squared values, ∑x

or ∑y

;

6. the number of data points, n;

7. the minimum variable value, xmin or ymin;

8. the maximum variable value, xmax or ymax; and

9. the sum of the x and y products, ∑xy.

STATISTICS FOR A

TWO-VARIABLE DATA SET

1 2 ... 14 15 16 17 18 19 20 21

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Sharp EL-120 User Manual Page 19