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Stratified sampling is used when the population is divided into distinct subgroups, or strata, that differ from each other in key characteristics (e.g., age, income, education level). This technique ensures that each subgroup is adequately represented in the sample by selecting samples proportionally from each stratum. For instance, if a researcher wants to study customer satisfaction among various age groups, stratified sampling would ensure that each age group is represented in proportion to its size in the population. This increases the accuracy of the results and helps make more reliable comparisons between subgroups. Why Other Options Are Incorrect: • A: Simple random sampling does not consider subgroups and may not be effective in capturing important differences in a population. • C: Cluster sampling involves dividing the population into groups and then randomly selecting whole groups, which may not capture the diversity within subgroups. • D: Systematic sampling selects every nth individual, which may not provide the representative diversity needed in heterogeneous populations. • E: Convenience sampling is based on easy access to data and does not guarantee that all subgroups will be adequately represented.
Select the most appropriate option to fill in the blank.
A ______ mind rarely meets a dead end; it continues the search for the answers.
Children need ___________ to make sense of their internal and external worlds.
Stretching helps prevent lower back pain __________ tightness in the lower body.
Select the most appropriate option to fill in the blank.
The antique store was filled with a ___________ collection of rare artifacts from aro...
The startup is growing quickly, but they need to ensure they don’t _______ and make careless mistakes.
Choose the most suitable option to fill in the blanks in the sentences below.
The project became so expensive that we had __________.
The team held on by the skin of their teeth to win the crucial match.
1) impressed
2) daunted
3) motivated
4) happy
5) cultivated
The _________ about teachers is that they are too preoccupied with cultivating professional excellence to bother about connectedness.
Fill in the blank with the most appropriate word.
She ______ her pearly white teeth in a broad smile.