Answer
Four methods of collecting data:
1. A designed experiment: Usually involves exerting full control over the characteristics of the experimental units sampled.
2. An observational study: Experimental units sampled are observed in their natural setting.
3. A representative sample: exhibits characteristics typical of those possessed by the target population.
4. A random sample: every different sample of size n has an equal chance of selection.
Work Step by Step
See definition above.
