Discuss the Difference Between Validity and Reliability When Making Measurements

Essay

Discuss the difference between validity and reliability when making measurements. Give an example of each.
a. Select two probability sampling techniques and explain why each is an example of probability. Give an example of a research project that would be appropriate for each sampling technique.
b. Select two non-probability sampling techniques and explain why each is an example. Give an example of a research project that would be appropriate for each sampling technique.