TY - JOUR
T1 - Allocating Sample Sizes to Reduce Budget for Fixed-Effect 2×2 Heterogeneous Analysis of Variance
AU - Luh, Wei Ming
AU - Guo, Jiin Huarng
PY - 2016/1/2
Y1 - 2016/1/2
N2 - This article discusses the sample size requirements for the interaction, row, and column effects, respectively, by forming a linear contrast for a 2×2 factorial design for fixed-effects heterogeneous analysis of variance. The proposed method uses the Welch t test and its corresponding degrees of freedom to calculate the final sample size in a 2-step procedure. The simulation results show that the proposed sample size allocation ratio can minimize the sampling cost, while at the same time the designated power is achieved. The article concludes with a discussion to reiterate the importance of sample size planning, especially for testing the iteration effect.
AB - This article discusses the sample size requirements for the interaction, row, and column effects, respectively, by forming a linear contrast for a 2×2 factorial design for fixed-effects heterogeneous analysis of variance. The proposed method uses the Welch t test and its corresponding degrees of freedom to calculate the final sample size in a 2-step procedure. The simulation results show that the proposed sample size allocation ratio can minimize the sampling cost, while at the same time the designated power is achieved. The article concludes with a discussion to reiterate the importance of sample size planning, especially for testing the iteration effect.
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U2 - 10.1080/00220973.2014.970119
DO - 10.1080/00220973.2014.970119
M3 - Article
AN - SCOPUS:84947020948
SN - 0022-0973
VL - 84
SP - 197
EP - 211
JO - Journal of Experimental Education
JF - Journal of Experimental Education
IS - 1
ER -