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@article{ART002960884},
author={Yonghwan Um},
title={Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient},
journal={Journal of The Korea Society of Computer and Information},
issn={1598-849X},
year={2023},
volume={28},
number={5},
pages={179-187},
doi={10.9708/jksci.2023.28.05.179}

TY - JOUR
AU - Yonghwan Um
TI - Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient
JO - Journal of The Korea Society of Computer and Information
PY - 2023
VL - 28
IS - 5
PB - The Korean Society Of Computer And Information
SP - 179
EP - 187
SN - 1598-849X
AB - In this paper, we studied the impact of outliers on the power of the significance tests for Cronbach alpha reliability coefficient. Four variables were varied: sample size, the number of items, the number of outliers and population Cronbach Alpha levels. We simulated data using multivariate normal distribution and used outliers sampled from uniform distribution. To test the significance of Cronbach Alpha Reliability, parametric approach(F statistic) and permutation method were used. Consequently, we observed that the powers of permutation test are equal to or greater than those of F test under all conditions, and also both F test and permutation test lose the power as the number of outliers increases, and that these effects of outliers on the power are enhanced for increasing population alpha levels.
KW - outliers;Cronbach alpha;reliability coefficient;power;permutation test
DO - 10.9708/jksci.2023.28.05.179
ER -

Yonghwan Um. (2023). Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient. Journal of The Korea Society of Computer and Information, 28(5), 179-187.

Yonghwan Um. 2023, "Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient", Journal of The Korea Society of Computer and Information, vol.28, no.5 pp.179-187. Available from: doi:10.9708/jksci.2023.28.05.179

Yonghwan Um "Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient" Journal of The Korea Society of Computer and Information 28.5 pp.179-187 (2023) : 179.

Yonghwan Um. Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient. 2023; 28(5), 179-187. Available from: doi:10.9708/jksci.2023.28.05.179

Yonghwan Um. "Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient" Journal of The Korea Society of Computer and Information 28, no.5 (2023) : 179-187.doi: 10.9708/jksci.2023.28.05.179

Yonghwan Um. Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient. Journal of The Korea Society of Computer and Information, 28(5), 179-187. doi: 10.9708/jksci.2023.28.05.179

Yonghwan Um. Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient. Journal of The Korea Society of Computer and Information. 2023; 28(5) 179-187. doi: 10.9708/jksci.2023.28.05.179

Yonghwan Um. Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient. 2023; 28(5), 179-187. Available from: doi:10.9708/jksci.2023.28.05.179

Yonghwan Um. "Outlier Impact on the Power of Significance Test for Cronbach Alpha Reliability Coefficient" Journal of The Korea Society of Computer and Information 28, no.5 (2023) : 179-187.doi: 10.9708/jksci.2023.28.05.179