1) Define what you need to look Objective of writing survey. Discover diabetic populace among the grown-up populace.
It is the impact brought by the intercession. The size of impact is the impact size. It is communicated numerically. Meta Analysis summates impact size for all and brings a typical impact size.
We get impact size(number). Just for down to earth reason and not for hypothesis. It resembles a numerical overview and measurably rigourous. It is done on survey paper on trial premise.