In a stratified sample,each selected subgroup is relatively homogeneous for a certain characteristic.

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Stratified sampling involves dividing the population into subgroups (or strata) based on certain characteristics, such as age or income. Each subgroup is then sampled and the overall sample is composed of individuals from each subgroup. Because each subgroup is selected based on a specific characteristic, it is expected to be relatively homogeneous for that characteristic. This helps to ensure that the sample is representative of the population and can lead to more accurate results.

In a Stratified Sample,each Selected Subgroup Is Relatively Homogeneous for a Certain