After reading this chapter, you should be able to

5.1 Explain why researchers select samples that are representative of a population of interest.

5.2 Identify and articulate the use of nonprobability sampling methods.

5.3 Identify and articulate the use of probability sampling methods.

5.4 Define and explain sampling error and the standard error of the mean.

5.5 Define and explain sampling bias and nonresponse bias.

5.6 Compute the one-sample t test using SPSS and justify the assumptions required for computing this test.