You have data from a corporation on the annual salary of each of its 200 employees. Illustrate how the data can be presented as ratio, interval, ordinal, and nominal data. Define and contrast a rating scale from a ranking scale. Give an example of each. Validity is more critical to measurement than is reliability.
Content validity is the most difficult type of validity to determine.
A valid measurement is reliable, but a reliable measurement may not be valid. Stability and equivalence are essentially the same thing. Parametric tests and nonparametric tests. I error and Type II error. Null hypothesis and alternative hypothesis.