Article

Atta, Abd and Shoraim, Majed and Syed Yahaya, Sharipah Soaad and Abuzaid, Ali and Mahdi, Esam (2020) Enhancing R control chart performance in monitoring process dispersion using scaled weighted variance method for skewed populations. Journal of Engineering and Applied Sciences, 15 (6). pp. 1508-1514. ISSN 1816949X

Abdullah, Suhaida and Zakaria, Nur Amira and Ahad, Nor Aishah and Yusof, Norhayati and Syed Yahaya, Sharipah Soaad (2020) Measuring the relationship of bivariate data using Hodges-Lehman estimator. ASM Science Journal, 13. pp. 1-5. ISSN 1823-6782

Zain, Zakiyah and Syed Yahaya, Sharipah Soaad and Ahmad, Nurzalikha and Atta, Abdu Mohammed Ali (2020) New X-bar control chart using skewness correction method for skewed distributions with application in healthcare. Systematic Review Pharmacy, 11 (2). pp. 230-236. ISSN 09758453

Atta, A.M.A. and Syed Yahaya, Sharipah Soaad and Zain, Zakiyah and Ahmad, Nurzalikha (2020) New skewness correction S control chart for monitoring dispersion of skewed data with application in healthcare. Systematic Reviews in Pharmacy, 11 (04). pp. 217-222. ISSN 09762779

Abdul Rahman, Ayu and Syed Yahaya, Sharipah Soaad and Atta, Abdu Mohammed Ali and Ahad, Nor Aishah and Hamid, Hashibah (2020) The impact of data anomaly on EWMA phase II performance. Journal of Engineering and Applied Sciences, 15 (15). pp. 3010-3015. ISSN 1816-949X

Abdullah, Suhaida and Teh, Kian Wooi and Syed Yahaya, Sharipah Soaad and Md Yusof, Zahayu (2020) The robustness of the modified H-statistic in the test of comparing independent groups. ASM Science Journal, 13. pp. 1-5. ISSN 1823-6782

Abdul Rahman, Ayu and Syed Yahaya, Sharipah Soaad and Atta, Abdu Mohammed Ali (2019) Robustification of CUSUM control structure for monitoring location shift of skewed distributions based on modified one-step M-estimator. Communications in Statistics - Simulation and Computation. pp. 1-18. ISSN 0361-0918

Abdul Rahman, Ayu and Syed Yahaya, Sharipah Soaad and Atta, Abdu Mohammed Ali (2018) The Effect of Median Based Estimators on CUSUM Chart. Journal of Telecommunication, Electronic and Computer Engineering, 10 (1-10). pp. 49-52. ISSN 2180-1843

Melik, Hameedah Naeem and Ahad, Nor Aishah and Syed Yahaya, Sharipah Soaad (2018) Modified one-step M-estimator with robust scale estimator for multivariate data. Journal of Engineering and Applied Sciences, 13 (24). pp. 10396-10400. ISSN 1816-949X

Ahad, Nor Aishah and Zakaria, Nur Amira and Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad and Yusof, Norhayati (2018) Robust Correlation Procedure via Sn Estimator. Journal of Telecommunication, Electronic and Computer Engineering, 10 (1-10). pp. 115-118. ISSN 2289-8131

Yai, Fung Lim and Syed Yahaya, Sharipah Soaad and Ali, Hazlina (2018) Robust Linear Discriminant Analysis with Highest Breakdown Point Estimator. Journal of Telecommunication, Electronic and Computer Engineering, 10 (1-10). pp. 7-12. ISSN 2289-8131

Ahmad Sabri, Ahmad Zaharuddin Sani and Mangsor, Fatinah and Syed Yahaya, Sharipah Soaad and Omar, Zurni and Ahmad, Azizah (2018) The impact of parent’s education towards youth leaders. Journal of Engineering and Applied Sciences, 13 (6). pp. 5359-5363. ISSN 1816-949X

Jamaluddin, F and Ali, H. H. and Syed Yahaya, Sharipah Soaad and Zain, Z. (2018) The performance of robust multivariate Ewma control charts. The Journal of Social Sciences Research (6). pp. 52-58. ISSN 24136670

Hamid, Hashibah and Long, Mei Mei and Syed Yahaya, Sharipah Soaad (2017) New Discrimination Procedure of Location Model for Handling Large Categorical Variables. Sains Malaysiana, 46 (06). pp. 1001-1010. ISSN 0126-6039

Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad and Md Yusof, Zahayu (2017) The Robust Test Statistic in Comparing Two Independent Groups using Trimming and Winsorization. International Journal of Basic & Applied Sciences, 17 (6). pp. 1-6. ISSN 2077-1223

Syed Yahaya, Sharipah Soaad and Lim, Yai-Fung and Ali, Hazlina and Omar, Zurni (2016) Robust linear discriminant analysis with automatic trimmed mean. Journal of Telecommunication, Electronic and Computer Engineering, 8 (10). pp. 1-3. ISSN 2180-1843

Ochuko, Tobi Kingsley and Abdullah, Suhaida and Zain, Zakiyah and Syed Yahaya, Sharipah Soaad (2016) Using real life data to validate the winsorized modified Alexander-Govern test. International Journal of Statistics and Applications, 6 (2). pp. 45-52. ISSN 2168-5193

Atta, Abdu Mohammed Ali and Shoraim, Majid H. A. and Syed Yahaya, Sharipah Soaad and Zain, Zakiyah and Ali, Hazlina (2016) A scaled weighted variance S control chart for skewed populations. Journal of Theoretical and Applied Information Technology, 91 (1). pp. 61-74. ISSN 1992-8645

Ali, Hazlina and Syed Yahaya, Sharipah Soaad and Omar, Zurni (2015) Enhancing minimum vector variance estimators using reweighted scheme. Far East Journal of Mathematical Sciences (FJMS), 98 (7). pp. 819-830. ISSN 0972-0871

Kingsley Ochuko, Tobi and Abdullah, Suhaida and Zain, Zakiyah and Syed Yahaya, Sharipah Soaad (2015) Modifying and evaluating the Alexander-Govern test using real data. Modern Applied Science, 9 (12). pp. 1-11. ISSN 1913-1844

Ismail, Mohd Isfahani and Ali, Hazlina and Syed Yahaya, Sharipah Soaad (2015) Robust parameter estimation method for bilinear model. AIP Conference Proceedings, 1691 (1). 050012. ISSN 0094-243X

Ochuko, Tobi Kingsley and Abdullah, Suhaida and Zain, Zakiyah and Syed Yahaya, Sharipah Soaad (2015) Winsorized modified one step m-estimator in Alexander-Govern test. Modern Applied Science, 9 (10). pp. 51-67. ISSN 1913-1844

Ochuko, Tobi Kingsley and Abdullah, Suhaida and Zain, Zakiyah and Syed Yahaya, Sharipah Soaad (2015) The modification and evaluation of the Alexander-Govern test in terms of power. Modern Applied Science, 9 (13). pp. 1-21. ISSN 1913-1844

Muhammad Di, Nur Faraidah and Syed Yahaya, Sharipah Soaad and Abdullah, Suhaida (2014) Comparing groups using robust H statistic with adaptive trimmed mean. Sains Malaysiana, 43 (4). pp. 643-648. ISSN 0126-6039

AMA, Atta and MHA, Shoraim and Syed Yahaya, Sharipah Soaad (2014) A multivariate EWMA control chart for skewed populations using weighted variance method. International Research Journal of Science and Engineering (IRJSE), 2 (6). pp. 191-202. ISSN 2322-0015

Md Yusof, Zahayu and Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad (2013) Comparing the performance of modified Ft statistic with ANOVA and Kruskal Wallis test. Applied Mathematics & Information Sciences An International Journal, 7 (21). pp. 403-408. ISSN 2373-8944

Ahad, Nor Aishah and Othman, Abdul Rahman and Syed Yahaya, Sharipah Soaad (2013) New procedure in testing differences between two groups. Applied Mathematics & Information Sciences, 7 (2L). pp. 397-401. ISSN 1935-0090

Ali, Hazlina and Syed Yahaya, Sharipah Soaad (2013) On robust mahalanobis distance issued from minimum vector variance. Far East Journal of Mathematical Sciences (FJMS), 74 (2). pp. 249-268. ISSN 0972-0871

Ali, Hazlina and Syed Yahaya, Sharipah Soaad and Omar, Zurni (2013) Robust hotelling control chart with consistent minimum vector variance. Mathematical Problems in Engineering, 2013. pp. 1-7. ISSN 1024-123X

Md Yusof, Zahayu and Othman, Abdul Rahman and Syed Yahaya, Sharipah Soaad (2013) Robustness of trimmed F statistic when handling non-normal data. Malaysian Journal of Science, 32 (1). pp. 73-77. ISSN 1394-3065

Ahad, Nor Aishah and Othman, Abdul Rahman and Syed Yahaya, Sharipah Soaad (2012) Performance of two-samples pseudo-median procedure. Sains Malaysiana, 41 (9). pp. 1149-1154. ISSN 0126-6039

Md Yusof, Zahayu and Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad and Othman, Abdul Rahman (2012) A robust alternative to the t - Test. Modern Applied Science, 6 (5). pp. 27-33. ISSN 1913-1844

Md Yusof, Zahayu and Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad (2012) Testing on the Difference of Student’s Performance using Robust Methods. World Applied Sciences Journal 17 (Special Issue of Applied Math), 17. pp. 66-71. ISSN 1818-4952

Md Yusof, Zahayu and Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad (2012) Testing the differences of students’ scores between two groups. Journal of Applied Sciences Research, 8 (9). pp. 4894-4899. ISSN 1819-544X

Md Yusof, Zahayu and Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad and Othman, Abdul Rahman (2012) Type I Error and Power Rates of Ft Statistic with Trimmed Mean. Far East Journal of Mathematical Sciences (FJMS), 69 (1). pp. 37-50. ISSN 0972-0871

Ahad, Nor Aishah and Othman, Abdul Rahman and Syed Yahaya, Sharipah Soaad (2011) Type I error rates of the two-sample pseudo-median procedure. Journal of Modern Applied Statistical Methods, 10 (2). pp. 418-423. ISSN 1538-9472

Ahad, Nor Aishah and Othman, Abdul Rahman and Syed Yahaya, Sharipah Soaad (2011) Comparative performance of pseudo-median procedure, Welch’s test and Mann-Whitney-Wilcoxon at specific pairing. Modern Applied Science, 5 (5). pp. 131-139. ISSN 1913-1844

Md Yusof, Zahayu and Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad and Othman, Abdul Rahman (2011) Testing the equality of central tendency measures using various trimming strategies. African Journal of Mathematics and Computer Science Research, 4 (1). pp. 32-38. ISSN 2006-9731

Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad and Othman, Abdul Rahman (2011) Kaedah Alexander-Govern terubah suai sebagai Alternatif kepada Ujian-t dan Ujian F ANOVA (Modified Alexander-Govern Test as Alternative to t-test and ANOVA F Test). Sains Malaysiana, 40 (10). pp. 1187-1192. ISSN 0126-6039

Abdul Rahim, Rahela and Ibrahim, Haslinda and Syed Yahaya, Sharipah Soaad and Khalid, K. (2011) Performance Evaluation of Web Portals. International Journal of Modeling and Optimization, 1 (5). pp. 396-401. ISSN 2010-3697

Md Yusof, Zahayu and Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad and Othman, Abdul Rahman (2011) Type I error rates of Ft statistic with different trimming strategies for two groups case. Modern Applied Science, 5 (4). pp. 236-242. ISSN 1913-1844

Syed Yahaya, Sharipah Soaad and Ali, Hazlina and Omar, Zurni (2011) An alternative hotelling T^2 control chart based on Minimum Vector Variance (MVV). Modern Applied Science, 5 (4). pp. 132-151. ISSN 1913-1844

Md Yusof, Zahayu and Othman, Abdul Rahman and Syed Yahaya, Sharipah Soaad (2010) Comparison of type I error rates between T1 and Ft statistics for unequal population variance using variable trimming. Malaysian Journal of Mathematical Sciences, 4 (2). pp. 195-207. ISSN 1823-8343

Md Yusof, Zahayu and Othman, Abdul Rahman and Syed Yahaya, Sharipah Soaad (2007) Statistik Terpangkas Ft Menggunakan Kriteria Pemangkasan Berdasarkan Penganggar Skala Teguh MAD. Menemui Matematik (Discovering Mathematics), 29 (1). pp. 21-28. ISSN 2231-7023

Book Section

Ahad, Nor Aishah and Syed Yahaya, Sharipah Soaad and Abdullah, Suhaida and Lim, Yai Fung and Md Yusof, Zahayu (2015) Type I error of the modified Wilcoxon signed rank test under leptokurtic distribution. In: Quest for Research Excellence on Computing, Mathematics and Statistics. Faculty of Computer & Mathematical Sciences, UiTM Kedah, Kedah, pp. 189-198. ISBN 978-967-0314-26-6

Monograph

Ahad, Nor Aishah and Abdullah, Suhaida and Md Yusof, Zahayu and Syed Yahaya, Sharipah Soaad and Lim, Yai Fung (2014) Modified Wilcoxon procedure for dependent group. Project Report. Universiti Utara Malaysia, Sintok.

Md Yusof, Zahayu and Syed Yahaya, Sharipah Soaad and Abdullah, Suhaida (2012) Testing the equality of central tendency measure using different trimming strategies. Project Report. UUM Press, Universiti Utara Malaysia.

Md Yusof, Zahayu and Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad (2011) Testing the equality of central tendency measures using T1 statistic with different trimming strategies. Project Report. Universiti Utara Malaysia. (Unpublished)

Abdul Rahim, Rahela and Ibrahim, Haslinda and Syed Yahaya, Sharipah Soaad and Ghazali, Osman (2009) Traffic modeling of web application. Project Report. Universiti Utara Malaysia. (Unpublished)

Syed Yahaya, Sharipah Soaad (2009) Comparison of methods for detecting treatment effects under skewed distributions. Project Report. Universiti Utara Malaysia. (Unpublished)

Yatim, Bidin and Syed Yahaya, Sharipah Soaad and Minai, Mohd Sobri and Omar, Zurni (1994) Kursus matematik punca utama kegagalan pelajar? Kajian kes di UUM. Project Report. Universiti Utara Malaysia, Sintok. (Unpublished)

Conference or Workshop Item

Pang, Yik Siong and Ahad, Nor Aishah and Syed Yahaya, Sharipah Soaad and Abdullah, Suhaida (2023) Robust Multiple Discriminant Rule Using Harrell-Davis\ Median Estimator: A Distribution-Free Approach to Cellwise-Casewise Outliers Coexistence. In: The 7th International Conference on Quantitative Sciences and its Applications (ICOQSIA2022), 22–24 August 2022, Sintok, Malaysia.

Ahad, Nor Aishah and Pang, Yik Siong and Syed Yahaya, Sharipah Soaad and Abdullah, Suhaida (2022) Robust Multiple Discriminant Rule with Hodges-Lehmann in Handling Equal Proportion of Cellwise-Casewise Outliers. In: The 7th International Conference on Quantitative Sciences and its Applications (ICOQSIA2022), 22–24 August 2022, Sintok, Malaysia.

Ahad, Nor Aishah and Syed Yahaya, Sharipah Soaad and Lee, Ping Yin (2016) Robustness of S1 statistic with Hodges-Lehmann for skewed distributions. In: 4th International Conference on Quantitative Sciences and Its Applications (ICOQSIA 2016), 16–18 August 2016, Bangi, Selangor, Malaysia.

Lim, Yai-Fung and Syed Yahaya, Sharipah Soaad and Ali, Hazlina (2016) Winsorization on linear discriminant analysis. In: 4th International Conference on Quantitative Sciences and Its Applications (ICOQSIA 2016), 16–18 August 2016, Bangi, Selangor, Malaysia.

Atta, Abdu Mohammed Ali and Syed Yahaya, Sharipah Soaad and Zain, Zakiyah and Ali, Hazlina (2016) An EWMA chart for sample range of Weibull data using weighted variance method. In: 4th International Conference on Quantitative Sciences and Its Applications (ICOQSIA 2016), 16–18 August 2016, Bangi, Selangor, Malaysia.

Zakaria, Nur Amira and Abdullah, Suhaida and Ahad, Nor Aishah and Yusof, Norhayati and Syed Yahaya, Sharipah Soaad (2016) The performance of robust correlation coefficient under contaminated bivariate data. In: 4th International Conference on Quantitative Sciences and Its Applications (ICOQSIA 2016), 16–18 August 2016, Bangi, Selangor, Malaysia.

Ahad, Nor Aishah and Syed Yahaya, Sharipah Soaad and Yin, Lee Ping (2015) Robustness of S1 with Hodges-Lehmann. In: 2nd Innovation and Analytics Conference & Exhibition (IACE 2015), 29 September –1 October 2015, TH Hotel, Alor Setar, Kedah, Malaysia.

Yin, Lee Ping and Syed Yahaya, Sharipah Soaad and Ahad, Nor Aishah (2015) S1 statistic with Hodges-Lehmann in two groups case for skewed distribution. In: 2nd Innovation and Analytics Conference & Exhibition (IACE 2015), 29 September –1 October 2015, TH Hotel, Alor Setar, Kedah, Malaysia.

Ali, Hazlina and Syed Yahaya, Sharipah Soaad and Omar, Zurni (2015) A computationally efficient of robust mahalanobis distance based on MVV estimator. In: International Symposium on Mathematical Sciences and Computing Research (iSMSC), 19-20 May 2015, Hotel Casuarina@Meru, Bandar Meru Raya, Ipoh, Perak Darul Ridzuan, MALAYSIA.

Ong, Gie Xao and Syed Yahaya, Sharipah Soaad and Abdullah, Suhaida and Md Yusof, Zahayu (2014) H-statistic with winsorized modified one-step M-estimator for two independent groups design. In: 21st National Symposium on Mathematical Sciences (SKSM21), 6–8 November 2013, Penang, Malaysia.

Joon Khim, Low and Syed Yahaya, Sharipah Soaad and Abdullah, Suhaida and Md Yusof, Zahayu and Othman, Abdul Rahman (2014) P-Method Post Hoc Test for Adaptive Trimmed Mean, HQ. In: International Conference on Quantitative Sciences and its Applications (ICOQSIA 2014), 12–14 August 2014, Langkawi, Kedah Malaysia.

Ahad, Nor Aishah and Syed Yahaya, Sharipah Soaad and Md Yusof, Zahayu and Abdullah, Suhaida and Yai Fung, Lim (2014) Performance of the Modified Wilcoxon Signed Rank Test. In: International Conference on Quantitative Sciences and its Applications (ICOQSIA 2014), 12–14 August 2014, Langkawi, Kedah Malaysia.

Lim, Yai-Fung and Syed Yahaya, Sharipah Soaad and Idris, Faoziah and Ali, Hazlina and Omar, Zurni (2014) Robust linear discriminant models to solve financial crisis in banking sectors. In: 3rd International Conference on Quantitative Sciences and its Applications (ICOQSIA 2014), 12–14 August 2014, Langkawi, Kedah Malaysia.

Ali, Hazlina and Syed Yahaya, Sharipah Soaad and Omar, Zurni (2014) The efficiency of reweighted minimum vector variance. In: 3rd International Conference on Mathematical Sciences, 17–19 December 2013, Kuala Lumpur, Malaysia.

Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad and Othman, Abdul Rahman (2013) A power investigation of Alexander Govern test with adaptive trimmed mean as a central tendency measure. In: 20th National Symposium on Mathematical Sciences, 18–20 December 2012, Palm Garden Hotel, Putrajaya, Malaysia.

Md Yusof, Zahayu and Abd Halim, Nurul Hanis and Syed Yahaya, Sharipah Soaad and Abdullah, Suhaida (2013) Modified parametric bootstrap: A robust alternative to classical test. In: World Conference on Integration of Knowledge: Business, Economy, Management, Cultural, Societal, Theological and Scientific (WCIK 2013), 25 & 26 November 2013, Langkawi, Malaysia.

Md Yusof, Zahayu and Othman, Abdul Rahman and Syed Yahaya, Sharipah Soaad (2010) Improvement of the trimmed mean procedure using bootstrap method. In: 2nd International Conference on Quantitative Sciences and Its Applications (ICOQSIA 2010), 2 - 4 November 2010, The Gurney Resort Hotel & Residences Penang, Malaysia. (Unpublished)

Md Yusof, Zahayu and Abdullah, Suhaida and Syed Yahaya, Sharipah Soaad (2010) Type I error rates of t-test and T1 statistic under balanced and unbalanced designs. In: Seminar Kebangsaan Sains Komputer dan Matematik (SKSKM 2010), 21 - 22 Disember 2010, Kota Kinabalu, Sabah. (Unpublished)

Ahad, Nor Aishah and Syed Yahaya, Sharipah Soaad and Othman, Abdul Rahman and Padmanabhan, Appasswamy Ramanathan (2009) Monte carlo procedure with pseudo-medians for asymmetric distributions. In: 5th Asian Mathematical Conference, 2009, Pulau Pinang. (Unpublished)

Book

Sharif, Shamshuritawati and Ali, Hazlina and Syed Yahaya, Sharipah Soaad (2016) Multivariate statistic for researchers. UUM Press, Sintok. ISBN 978-967-0876-76-4

Sharif, Shamshuritawati and Syed Yahaya, Sharipah Soaad and Saaban, Azizan (2016) Scientific investigation on univariate quantitative methods. Universiti Utara Malaysia Press, Sintok. ISBN 978-967-0876-75-7

Md Yusof, Zahayu and Syed Yahaya, Sharipah Soaad and Abdullah, Suhaida (2014) Testing on performance using robust methods. Monograph Series statistics . Universiti Utara Malaysia Press, Sintok. ISBN 978-967-0474-71-7

Yatim, Bidin and Syed Yahaya, Sharipah Soaad (2001) Statistik gunaan. Penerbit Universiti Utara Malaysia, Sintok. ISBN 9839559680