1) Please explain the difference between descriptive and inferential statistics in at least two sentences.

2) Please explain the relationship between a population and a sample in at least two sentences.

3) Please explain why random assignment is necessary for a true experiment.

4) Please design an experiment or quasi-experiment and explain why it is one or the other.

5) Please give an example of a positive or negative correlational design and explain why it is one or the other.

6) Please write out an operational definition for the variable "anxiety."

7) Please make up an example of each of the following types of scales: a. Nominal b. Ordinal c. Interval d. Ratio