A random sampling where the population is divided into non-coinciding groups are called strata and a sample is picked out by some design within each strata is known as stratified sampling.
Given : The population of a town is divided into three age categories which are strata . A random sample of each category is surveyed about voting
choices.
Then this type of sampling is called stratified sampling.
The population of a town is divided into three age categories. A random sample of each category is surveyed about voting choices. this type of sampling is called stratified sampling.
Step-by-step explanation:
Stratified sampling refers to a type of sampling technique whereby an analyst or researcher divides the large population of interest into a number of groups, referred to as strata.
The researcher then obtains a simple random sample from the respective groups or categories.
