3. A high school principal polls 50 freshmen, 50 sophomores, 50 juniors, and 50 seniors regarding policy changes for after-school activities. What kind of sampling does this represent?Simple random samplingConvenience samplingSystematic samplingStratified samplingCluster sampling
Stratified sampling is a method of sampling that involves the division of a population into smaller sub-groups known as strata. In stratified random sampling, or stratification, the strata are formed based on members' shared attributes or characteristics such as income or educational attainment.
