Across
- 4. Researchers directly observe and record behavior or events.
- 6. Direct interaction between a researcher and a participation.
- 8. Involve asking individuals a set of predetermined questions.
- 9. It is non-numerical and used to categorize or describe properties
- 10. Researchers manipulate variables to observe the effect of the outcome.
Down
- 1. The set containing all elements from two or more sets (combination).
- 2. It involves quantities and amounts, and is used to perform mathematical operations.
- 3. The set containing only elements common to two or more sets (overlap).
- 5. Selecting every nth individual from a random start.
- 7. Dividing the population into subgroups or strata.