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Supahar, Supahar
Universitas Negeri Yogyakarta
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Journal : JURNAL MATEMATIKA STATISTIKA DAN KOMPUTASI

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Effect of Variability on Cronbach Alpha Reliability in Research Practice Muhammad Amirrudin; Khoirunnisa Nasution; Supahar Supahar
Jurnal Matematika, Statistika dan Komputasi Vol. 17 No. 2 (2021): JANUARY 2021
Publisher : Department of Mathematics, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jmsk.v17i2.11655

Abstract

This study aims to describe the effects of variability through data simulation to determine which aspect of variability that maximizes coefficient of Cronbach Alpha reliability. Cronbach Alpha is widely used for estimation of reliability, in recent still. This study served a conceptual and practical simulation for estimating the profound aspect of Cronbach Alpha coefficient relating to the variability of the data. This study carried out with data simulated using the rand between method by Microsoft Excel then simulate different categorical data responses to different range of items by manipulating sample size, range, number of items, variance and standard deviation. The results show that number of variance and standard deviation of data had the most profound aspect of Cronbach Alpha's reliability other than range. The increasing number on some aspect shows that standard deviation and variance has the stability to shows the positive correlation with the coefficient of Cronbach Alpha reliability other than range.
Co-Authors Afifah, Reny Agatha Pindha Sitaresmi Agatha Pindha Sitaresmi AHSAN ABDULFATTAH Andi Reski Anindyarini, Rosyita Apriliyani, Dini Sukma Arimbi Rachmayani Arnita Rapang Aulia Hermawati Ulfah Awal Mulia Rejeki Tumanggor Az Zahro, Siti Fatimah Azizah, Isma Azzizzah, Frida Amriyati Bara, Farida Tandi Bashooir, K. Bashooir, Khoirul Budi Handono Dadan Rosana Deby Kurnia Dewi Desy Kumala Sari Desy Kumala Sari Dewi Liesnoor Setyowati Dyah Ayu Fitriana Dyaz, Iqbal Edi Istiyono Edt Istiyono Edt Istiyono, Edt Istiyono Eko Wahyunanto Prihono Ernila Siringo Ringo Esti Nugraheny Faila, Rohaya Evatri Fajrul Muhammad Bahri Fauzan, Muhammad Ikhwan Fitriana, Dyah Ayu Handayani, Novia Amarta Hanindya, Yovita Harliadi, Muhammad Dika Heri Retnawati Insih Wilujeng Ivandra Immanuela Latumakulita Jumadi Jumadi Jumadi Khoirunnisa Nasution Kusumawati, Andhiani Eka Lestari, Indiyah Lilik Kurniawan Marina Ramadani Marwiyah, Mulyani Meyska Widyandini Muhammad Amirrudin Muhammad Dika Harliadi Muhammad Fajrul Bahri Mutia Ulfah Seftianingsih Mwakapemba, James Leonard Ni'mah, Ayu Mar'ati Barokatun Nopiyanti Nopiyanti Nopiyanti Nopiyanti, Nopiyanti Novianto, Khairul Putra Nur Azizah nur fauzah eryanti Pebriana, Irvany Nurita Pri Ariadi Cahya Dinata Pri Ariadi Cahya Dinata, Pri Ariadi Cahya Pujianto Pujianto Puspa Indah Devitasari Puspita Sari, Mega Indah Ramadani, Marina Rapang, Arnita Reski, Andi Riki Perdana Ringo, Ernila Siringo Riwayani Riwayani Riwayani, Riwayani Rosyita Anindyarini Rosyita Anindyarini Sajdah, Siti Nurul Sari, Desy Kumala Seran, D'aquinaldo Stefanus Fani Siti Nurjanah Soeharto Soeharto Soeharto Soeharto Sukardiyono Sukardiyono Sultan, Jumriani Sumarhadi, Anas Suparwoto Suparwoto Surahman, Ence Tantri, Risma Ulfah, Aulia Hermawati Vika Asriningtyas Vika Asriningtyas Yuni Kusmiyati Yuni Kusmiyati Zuhdan Kun Prasetyo Zukhruf, Naura