Text and Data Mining valid from 2020-04-16
Received: 16 July 2019
Accepted: 12 March 2020
First Online: 16 April 2020
: I confirm that I have read Springer Open’s guidance on competing interests and have included a statement indicating that <b>none of the authors have any competing interests in the manuscript.</b> The authors of this manuscript are the Postgraduate Doctoral (PhD) candidates from Universiti Teknologi Malaysia (UTM) and their thesis supervisors. Since this study used secondary data from the official source of Malaysia’s Department of Statistics, we therefore decide to <b>not share the data</b> to the public.