H CONSISTENCY STATISTIC

H CONSISTENCY STATISTIC (LET)

Let Subcommand

Compute the h-consistency statistic of a variable as defined by the ASTM E 691 - 99 standard.

The h-consistency statistic is defined in the ASTM E 691 - 99 standard as
(between laboratory consistency statistic)

with

d = cell deviation (cell average - average of cell averages)
= standard deviations of cell averages

LET <h> = H CONSISTENCY STATISTIC <y> <labid>
            <SUBSET/EXCEPT/FOR qualification>
where <y> is a response variable;
            <labid> is a lab-id variable;
            <h> is a variable where the h-consistency statistic values are saved;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.

This syntax is used to compute the h-consistency statistic for a single material. The number of h-values is equal to the number of laboratories.

LET <h> = H CONSISTENCY STATISTIC <y> <labid> <matid>
            <SUBSET/EXCEPT/FOR qualification>
where <y> is a response variable;
            <labid> is a lab-id variable;
            <matid> is a material-id variable;
            <h> is a variable where the h-consistency statistic values are saved;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.

This syntax is used to compute the h-consistency statistic for multiple materials. The number of h-values is equal to the number of materials times the number of laboratories.

LET A = H CONSISTENCY STATISTIC Y LAB
LET HVAL = H CONSISTENCY STATISTIC Y LAB MAT
LET HVAL = H CONSISTENCY STATISTIC Y LAB MAT SUBSET MAT > 2

None

None

E691 INTERLAB	= Perform an E691 interlab analysis.
K CONSISTENCY STATISTIC	= Compute the k-consistency statistic.

"Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method", ASTM International, 100 Barr Harbor Drive, PO BOX C700, West Conshohoceken, PA 19428-2959, USA.

Interlaboratory Analysis

2005/4

SKIP 25
READ GLUCOSE.DAT Y MATID LABID
.
LET HVAL = H CONSISTENCY STATISTIC Y LABID MATID