DIFFERENCE OF COUNT

DIFFERENCE OF COUNT (LET)

Let Subcommand

Compute the difference between the count (sample size) for two response variables.

The count is the number of obserations in a response variable.

For the differeence of counts, the count is computed for each of two samples then their difference is taken.

LET <par> = DIFFERENCE OF COUNT <y1> <y2>
                        <SUBSET/EXCEPT/FOR qualification>
where <y1> is the first response variable;
            <y2> is the first response variable;
            <par> is a parameter where the computed difference of the counts is stored;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.

LET A = DIFFERENCE OF COUNT Y1 Y2
LET A = DIFFERENCE OF COUNT Y1 Y2 SUBSET X > 1

Dataplot statistics can be used in a number of commands. For details, enter
HELP STATISTICS

None

DIFFERENCE OF SIZE and DIFFERENCE OF NUMBER are synonyms for DIFFERENCE OF COUNT.

COUNT	= Compute the count.
MINIMUM	= Compute the minimum.
MAXIMUM	= Compute the maximum.
SUM	= Compute the sum.
DIFFERENCE OF MINIMUM	= Compute the difference of the minimums.
DIFFERENCE OF MAXIMUM	= Compute the difference of the maximums.
DIFFERENCE OF SUM	= Compute the difference of sums.

Data Analysis

2003/03

SKIP 25 
READ AUTO83B.DAT Y1 Y2 
. 
RETAIN Y2 SUBSET Y2 > -900 
LET A = DIFFERENCE OF COUNT Y1 Y2