When is Good time for reliability test? 

Oh my ! You made me stunned! Don't know how to thank you. Am quenched! Very smart and even more caring to your subscribers. I do respect you in capital " R". Love you as always❤❤❤❤ If don't mind me asking you once again, please react on this question,too. My question is , is the pilot test conducted on few from sample or few from the total population? ❤🙏

dear Melaku I appreciate your effort, commitment and skill . can you pls make a video explaining how to analyze a pre-post design pls? kindly

Thank you You are my reference man

👌👌👌

Can I ask you a question bro?. how can we calculate a sample size for a case-control study without having a previous study?. Thank you

❤❤❤