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Outlier detection in multiple circular regression model using DFFITC statistic
Najla Ahmed Alkasadi1, Safwati Ibrahim2, Abuzaid, Ali H.M3, Mohd Irwan Yusoff4, Hashibah Hamid5, Leow, Wai Zhe6, Amelia Abd Razak7.
This paper presents the identification of outliers in multiple circular regression model (MCRM), where the model studies the relationship between two or more circular variables. To date, most of the published papers concentrating on detecting outliers in circular samples and simple circular regression model with one independent circular variable. However, no related studies have been found for more than one independent circular variable. The existence of outliers could alert the sign and change the magnitude of regression coefficients and may lead to inaccurate model development and wrong prediction. Hence, the intention is to develop an outlier detection procedure using DFFITS statistic for circular case. This method has been successfully used in multiple linear regression model. Therefore, the DFFITc statistic for circular variable has been derived. The corresponding critical values and the performance of the procedure are studied via simulations. The results of simulation studies show that the proposed statistic perform well in detecting outliers in MCRM using DFFITc statistic. The proposed statistic was applied to a real data for illustration purposes.
Affiliation:
- Universiti Malaysia Perlis, Malaysia
- Universiti Malaysia Perlis, Malaysia
- Al-Azhar University - Gaza (AUG), Palestine
- Universiti Malaysia Perlis, Malaysia
- Universiti Utara Malaysia, Malaysia
- Universiti Malaysia Perlis, Malaysia
- Universiti Malaysia Perlis, Malaysia
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Indexed by |
MyJurnal (2021) |
H-Index
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6 |
Immediacy Index
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0.000 |
Rank |
0 |
Indexed by |
Web of Science (SCIE - Science Citation Index Expanded) |
Impact Factor
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JCR (1.009) |
Rank |
Q4 (Multidisciplinary Sciences) |
Additional Information |
JCI (0.15) |
Indexed by |
Scopus 2020 |
Impact Factor
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CiteScore (1.4) |
Rank |
Q2 (Multidisciplinary) |
Additional Information |
SJR (0.251) |
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