Construction of some new three associate class partially balanced incomplete block designs in two replicates
Date
Journal Title
Journal ISSN
Volume Title
Publisher
IMHOTEP Mathematical Proceedings
Abstract
Search for experimental designs which aid in research studies involving
large number of treatments with minimal experimental units has been desired
overtime. This paper constructs some new series of three associate Partially
Balanced Incomplete Block (PBIB) designs having n(n - 2) /4 treatments
with three associate classes in two replicates using the concept of triangular
association scheme. The design is constructed from an even squared array
of n rows and n columns (n _> 8) with its both diagonal entries bearing no
treatment entries and that given the location of any treatment in the squared
array, the other location of the same treatment in the array is predetermined.
The design and association parameters for a general case of an even integer
n >_8 are obtained with an illustrated case for n = 8. Efficiencies of the
designs within the class of designs are obtained for a general case of even n >_8
with a listing of efficiencies of designs with blocks sizes in the interval [8,22].
The designs constructed have three associate classes and are irreducible to
minimum number of associate classes.
Description
Paper presented at the 2nd Strathmore International Mathematics Conference (SIMC 2013), 12 - 16 August 2013, Strathmore University, Nairobi, Kenya.
Search for experimental designs which aid in research studies involving large number of treatments with minimal experimental units has been desired overtime. This paper constructs some new series of three associate Partially Balanced Incomplete Block (PBIB) designs having n(n - 2) /4 treatments with three associate classes in two replicates using the concept of triangular association scheme. The design is constructed from an even squared array of n rows and n columns (n _> 8) with its both diagonal entries bearing no treatment entries and that given the location of any treatment in the squared array, the other location of the same treatment in the array is predetermined. The design and association parameters for a general case of an even integer n >_8 are obtained with an illustrated case for n = 8. Efficiencies of the designs within the class of designs are obtained for a general case of even n >_8 with a listing of efficiencies of designs with blocks sizes in the interval [8,22]. The designs constructed have three associate classes and are irreducible to minimum number of associate classes.
Search for experimental designs which aid in research studies involving large number of treatments with minimal experimental units has been desired overtime. This paper constructs some new series of three associate Partially Balanced Incomplete Block (PBIB) designs having n(n - 2) /4 treatments with three associate classes in two replicates using the concept of triangular association scheme. The design is constructed from an even squared array of n rows and n columns (n _> 8) with its both diagonal entries bearing no treatment entries and that given the location of any treatment in the squared array, the other location of the same treatment in the array is predetermined. The design and association parameters for a general case of an even integer n >_8 are obtained with an illustrated case for n = 8. Efficiencies of the designs within the class of designs are obtained for a general case of even n >_8 with a listing of efficiencies of designs with blocks sizes in the interval [8,22]. The designs constructed have three associate classes and are irreducible to minimum number of associate classes.
Keywords
Partially Balanced Incomplete Block (PBIB), Associate class, three associate classes.