136 Chapter 7: Statistical Analyses
7307ENG.DOC CH 7, Statistical Analyses, English Julie Hewlett Revised: 07/29/98 12:07 PM Printed: 05/19/99
9:00 AM Page 136 of 22

What Do the Results Mean?

1-Var Stats and 2-Var Stats variables are calculated and stored as
indicated below. To access these variables for use in
expressions, press - } 3:Statistics and select the
appropriate menu. If you edit a list or change the type of
analysis, all statistical variables are cleared.
Variables Definition VARS Menu
x or yMean of all x or y values. XY
Gx or GySum of all x values or y values. G
Gx2 or Gy2Sum of all x2 values or y2
values.
G
Sx or Sy Sample standard deviation of
x or y.
XY
sx or syPopulation standard deviation
of x or y.
XY
nNumber of x or x,y data points. XY
minX
minY
Minimum of x values or y
values.
XY
maxX
maxY
Maximum of x values or y
values.
XY
Gxy Sum of x¦y for all xy pairs in
two lists.
G
Q1Median of the elements
between minX and Med (1st
quartile). Only calculated for
1-Var Stats.
PTS
Med Median of all data points. PTS
Q3Median of the elements
between Med and maxX (3rd
quartile). Only calculated for
1-Var Stats.
PTS