NAME _____________________________________________________ CLASS __________ DATE __________
Copyright © 1998, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
6.1
NUMERICAL DESCRIPTION OF
A TWO-VARIABLE DATA SET
Steps for calculating numerical descriptions of a
1.Turn the calculator on and press STAT to enter the statistics menu. Touch A EDIT and press 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:
XY
2532
2833
3127
4038
2930
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 , touch C CALC, and double touch 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 represents the entire population, σ x or σ y;
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.
72Blackline Masters/STATISTICS USING THE SHARP