 Dataplot Vol 2 Vol 1

# DIFFERENCE OF MIDRANGE

Name:
DIFFERENCE OF MIDRANGE (LET)
Type:
Let Subcommand
Purpose:
Compute the difference between the midranges for two response variables.
Description:
The midrange is the mean of the minimum and maximum points (i.e., (min + max)/2) of a response variable.

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

Syntax:
LET <par> = DIFFERENCE OF MIDRANGE <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 midranges is stored;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.
Examples:
LET A = DIFFERENCE OF MIDRANGE Y1 Y2
LET A = DIFFERENCE OF MIDRANGE Y1 Y2 SUBSET X > 1
Note:
Dataplot statistics can be used in a number of commands. For details, enter

Default:
None
Synonyms:
None
Related Commands:
 MIDRANGE = Compute the midrange. RANGE = Compute the range. MINIMUM = Compute the minimum. MAXIMUM = Compute the maximum. QUANTILE = Compute a quantile. MEAN = Compute the mean. STANDARD DEVIATION = Compute the standard deviation. DIFFERENCE OF RANGE = Compute the difference of the ranges. DIFFERENCE OF MEAN = Compute the difference of the means. DIFFERENCE OF SD = Compute the difference of standard deviations. DIFFERENCE OF QUANTILE = Compute the difference of a quantile. STATISTICS PLOT = Generate a statistic versus subset plot. BOOTSTRAP PLOT = Generate a bootstrap plot. TABULATE = Perform a tabulation for a specified statistic.
Applications:
Data Analysis
Implementation Date:
2003/03
Program:
```SKIP 25
READ IRIS.DAT Y1 TO Y4 X
.
LET A = DIFFERENCE OF MIDRANGE Y1 Y2
TABULATE DIFFERENCE OF MIDRANGE Y1 Y2 X
.
XTIC OFFSET 0.2 0.2
X1LABEL GROUP ID
Y1LABEL DIFFERENCE OF MIDRANGE
CHAR X
LINE BLANK
DIFFERENCE OF MIDRANGE PLOT Y1 Y2 X
CHAR X ALL
LINE BLANK ALL
BOOTSTRAP DIFFERENCE OF MIDRANGE PLOT Y1 Y2 X
```
Dataplot generated the following output.
```       ********************************************
**  LET A = DIFFERENCE OF MIDRANGE Y1 Y2  **
********************************************

THE COMPUTED VALUE OF THE CONSTANT A             =  0.29000003E+01

***********************************************
**  TABULATE DIFFERENCE OF MIDRANGE Y1 Y2 X  **
***********************************************

*    Y1       AND Y2
X           *    DIFFERENCE OF MIDRANGES
**********************************************
1.00000     *     1.70000
2.00000     *     3.25000
3.00000     *     3.40000

GROUP-ID AND STATISTIC WRITTEN TO FILE DPST1F.DAT
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Date created: 03/27/2003
Last updated: 11/09/2015