108 TI-Nspire™ Reference Guide
TwoVar
Catalog
>
TwoVar X, Y[, [Freq] [, Category, Include]]
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 | 0.
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 Description
stat.v
Mean of x values
stat.Gx Sum of x values
stat.Gx2 Sum of x2 values
stat.sx Sample standard deviation of x
stat.sx Population standard deviation of x
stat.n Number of data points
stat.w
Mean of y values
stat.Gy Sum of y values
stat.Gy
2
Sum of y2 values
stat.sy Sample standard deviation of y
stat.sy Population standard deviation of y
stat.Gxy Sum of x·y values
stat.r Correlation coefficient
stat.MinX Minimum of x values
stat.Q
1
X 1st Quartile of x
stat.MedianX Median of x
stat.Q
3
X 3rd Quartile of x
stat.MaxX Maximum of x values
stat.MinY Minimum of y values
stat.Q
1
Y 1st Quartile of y
To Next Page
Loading...
Need help?
General
Weight and Dimensions
