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Stratified sampling is the most suitable technique when the population is divided into distinct subgroups (strata), and it is crucial to ensure that each subgroup is represented proportionally. In this method, the population is first divided into homogeneous subgroups based on a characteristic (e.g., age, income, education), and then a random sample is drawn from each subgroup. This ensures that the sample accurately represents the entire population, especially when certain subgroups are underrepresented in a simple random sample. Option A is incorrect because simple random sampling does not ensure proportional representation of subgroups. Option C is incorrect because cluster sampling divides the population into clusters, which may not necessarily represent subgroups proportionally. Option D is incorrect because systematic sampling involves selecting every nth element from a population, which does not guarantee proportional subgroup representation. Option E is incorrect because convenience sampling involves selecting individuals who are easiest to reach, which does not guarantee a representative sample.
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.