Twovar - Texas Instruments TI-Nspire Reference Manual

TwoVar

X Y Freq Category
TwoVar , [, [ ] [,
Calculates the TwoVar statistics. A summary of results is stored in the
stat.results variable. (See page 97.)
All the lists must have equal dimension except for Include.
X and Y are lists of independent and dependent variables.
Freq is an optional list of frequency values. Each element in Freq
specifies the frequency of occurrence for each corresponding X and Y
data point. The default value is 1. All elements must be integers
Category is a list of numeric category codes for the corresponding X
and Y data.
Include is a list of one or more of the category codes. Only those data
items whose category code is included in this list are included in the
calculation.
An empty (void) element in any of the lists X, Freq, or Category
results in a void for the corresponding element of all those lists. An
empty element in any of the lists X1 through X20 results in a void for
the corresponding element of all those lists. For more information on
empty elements, see page 131.
Output variable
v
stat.
stat.Gx
stat.Gx2
stat.sx
stat.sx
stat.n
w
stat.
stat.Gy
2
stat.Gy
stat.sy
stat.sy
stat.Gxy
stat.r
stat.MinX
stat.Q X
1
stat.MedianX
stat.Q X
3
stat.MaxX
stat.MinY
stat.Q Y
1
108 TI-Nspire™ Reference Guide
Include
, ]]
Description
Mean of x values
Sum of x values
Sum of x2 values
Sample standard deviation of x
Population standard deviation of x
Number of data points
Mean of y values
Sum of y values
Sum of y2 values
Sample standard deviation of y
Population standard deviation of y
Sum of x·y values
Correlation coefficient
Minimum of x values
1st Quartile of x
Median of x
3rd Quartile of x
Maximum of x values
Minimum of y values
1st Quartile of y
|
0.
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