Detalle de Cambio

Cambio #7 Number of problems (E-2012A)
Descripción Originalmente, there was only one problem.
En esta replicación, there were two problems.
Con el propósito de use two problems due to the new design and the blocking variables.
Dimensión Protocolo, específicamente, diseño experimental.
Efectos sobre la validez
  • Este cambio incrementa moderadamente (+2) la validez interna porque in the new design 2 blocking variables have been defined
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