Across
- 2. Set of counting numbers include zero
- 4. involve asking individuals set of predetermined questions
- 6. set of numbers that cannot be written as fraction
- 8. involve direct interaction between a Reasercher
Down
- 1. Researcher directly observe and record behavior
- 3. examination of a single case
- 5. Reaserchers manipulate variables.
- 7. numbers set of numbers that can be expressed as fraction