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On theE-optimality of certain asymmetrical designs under mixed effects model

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Abstract

TheE-optimality of the following designs within the class of all proper and connected designs with givenb, k andv under mixed effects model are established.

  1. i)

    A group divisible design with λ2 = λ1 + 1.

  2. ii)

    A group divisible design with λ1 = λ2 + 1 and group size 2.

  3. iii)

    A linked block design.

  4. iv)

    The dual of design (i)

  5. v)

    The dual of design (ii).

All these designs are known to satisfy the same optimality property under fixed effects model whenk<v, while the design (i) is known to beE-optimal even whenk>v. From the results proved here, theE-optimality of designs (ii, (iii), (iv) and (v) under fixed effects model in the situation whenk >v also follows.

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Bagchi, S. On theE-optimality of certain asymmetrical designs under mixed effects model. Metrika 34, 95–105 (1987). https://doi.org/10.1007/BF02613134

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  • DOI: https://doi.org/10.1007/BF02613134

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