Ceramah Encik Andul Halim

 https://www.youtube.com/watch?v=ObEYldr3dmo

https://www.youtube.com/watch?v=v0oz_K-GdgQ

May Allah grant rahmah for his Soul ..Sir Abdul Halim Abdul Hamid

 

Correlation Coefficient Degree of freedom (checking validity)

https://www.youtube.com/watch?v=gVUR7sR2iDM

https://www.spsstests.com/2015/02/how-to-test-validity-questionnaire.html

http://site.iugaza.edu.ps/nbarakat/files/2010/02/correlation-table-pearson.pdf