Collecting Quantitative Data

Front

Steps in collecting data

Back

Identify participants, obtain permissions, select information, locate instruments, administer process.

Front

Unit of analysis

Back

Level of data collection: individual, family, school, district.

Front

Population vs Sample

Back

Population: entire group; Sample: subset of population.

Front

Target population

Back

Group with common characteristics for study.

Front

Sampling error

Back

Difference between sample estimate and true population score.

Front

Probability sampling

Back

Representative selection from population.

Front

Simple random sampling

Back

Equal probability for all individuals.

Front

Systematic sampling

Back

Select every nth individual.

Front

Stratified sampling

Back

Divide population into strata and sample from each.

Front

Multistage cluster sampling

Back

Sample in stages from large populations.