What is Standard Deviation in Concrete Quality Control: Nayak OR Khalnayak?

Welcome to The Concrete Show - this is my Weekly YouTube Live that I broadcast every Wednesday 8:00pm In this episode, we will look at the role of the Standard Deviation in Concrete in a fun way and what our IS code 456 says about it. Standard Deviation is an important quality control tool for concrete - Lets master it. Please give your comments below.