Data Collection (HSC SSCE Mathematics Standard): Flashcards

Data you collect directly yourself (surveys, interviews, etc.)

Data already collected by others (books, websites, reports)

Survey of every single member of a population

Data collected from only part of a population

Every member has equal chance of being selected

Divide into categories, then randomly select from each

Select at regular intervals from organised population

Members choose to participate themselves (volunteers)

Accurate, up-to-date, relevant, secure

Very expensive, time-consuming, and often impractical