Sharp EL-9900 EL9900 Operation Manual - Page 108

Numerical Description Of A, Two-variable Data Set

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NUMERICAL DESCRIPTION OF A TWO-VARIABLE DATA SET Steps for calculating numerical descriptions of a two-variable data set 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. Enter the following data set: X Y 25 32 28 33 31 27 40 38 29 30 2. 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. 3. Press ▼ to view the remaining statistics. 4. The statistics displayed are: 1. the average or mean value of the variable, x or y ; 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 represent the entire population, σx or σy; 4. the sum of the values, ∑x or ∑y; 5. the sum of the squared values, ∑x2 or ∑y2; 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. 11 Advanced Keyboard/STATISTICS USING THE SHARP EL-9900 Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.

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11
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 two-variable
data set
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.
Enter the following data set:
X
Y
25
32
28
33
31
27
40
38
29
30
2.
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.
3.
Press
▼
to view the remaining statistics.
4.
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 represent the entire
population,
σ
x
or
σ
y
;
4.
the sum of the values,
∑
x or
∑
y;
5.
the sum of the squared values,
∑
x
2
or
∑
y
2
;
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.
NUMERICAL DESCRIPTION OF A
TWO-VARIABLE DATA SET
x
y