chapter 1 vocab.

2. chance of an event occurring
3. variable-the resultant variable
5. study- a study that uses intact groups rather than random assignment of subjects to groups
7. of all subjects (human or otherwise) that are being studied
10. variables-can assume an infinite number of values between any two specific values. They are obtained by measuring. They often include fractions and decimals.
11. sample-subjects are selected by random numbers
12. variable-in an experimental study is the one that is being manipulated by the researcher.
14. variables-are variables that can be placed into distinct categories, according to some characteristic or attribute.
15. group-the group that received the special instruction is called the treatment group while the other is called
16. a characteristic or attribute that can assume different values
17. variable-variables whose values are determined by chance are
18. variable-the resultant variable
19. and hypothesis tests, determining relationships among variables, and making predictions
20. group-the group that received the special instruction is called the

1. statistics-consists of generalizing from samples to populations, performing
4. variable-the independent variable is also
6. variable-is one that influences the dependent or outcome variable but was not separated from the independent variable.
8. a group of subjects selected from a population
9. effect-researchers found that the subjects who knew they were participating in an experiment actually changed their behavior in ways that affected the results of the study.
13. variables-assume values that can be counted
14. variables-are numerical and can be ordered or ranked