The type of sampling technique that has advantage of a built-in assurance of which the sample accurately reflects the numerical compositions of various strata is called: stratified sampling.
Stratified sampling is a sampling technique that involves dividing a population into strata. The strata are composed of each member's shared attributes or characteristics.
Thus, the type of sampling technique that has advantage of a built-in assurance of which the sample accurately reflects the numerical compositions of various strata is called: stratified sampling.
Learn more about stratified sampling on:
https://brainly.com/question/16587013