
4. Move the highlight to the column to be deleted.
5. Press (NXT1 --COL . The column is deleted.
6. Press fENTER) to return the modified matrix to the STAT
application.
To mathematically transform the data in a list:
1. Put the data list onto the stack.
2. Perform the arithmetic necessary to transform each datum in the
list. For example, to perform the transformation, x' = 31n.c — 4,
press fr^fLN 1 3 Q 4 Q. (Remember to use (MTH) L. I ST HDD
for list element addition instead of (Q.)
Calculating Single-Variable Statistics
21 If your statistical data measures a sample of a population, you
calculate sample statistics. If, however, your data measures the entire
population, you calculate population statistics.
The single-variable statistics built into the STAT application are:
MEflH Returns the arithmetic mean of the data in the
selected column.
STD DEV Returns the standard deviation of the data in the
selected column. It computes the version of the
standard deviation indicated by the TYPE s field
(sample or population).
vflRIflHCE Returns the variance of the data in the selected
column. It computes the version of the variance
indicated by the TYPE" field (sample or population).
TuThL Returns the sum of the data in the selected column.
MhKIMIJM Returns the value of the largest datum in the
selected column.
MINIflUfl Returns the value of the smallest datum in the
selected column.
21-6 Statistics and Data Analysis
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