Elementary Statistics for Public Administration An Applied Perspective

This chapter focuses on the most common statistical tests used when the dependent variable is measured at the interval level and the independent variable is nominal with two categories.The one-sample t-test is first introduced so that students can understand comparing a value of the dependent variable to another value.Then, the independent samples t-test is discussed, followed by the dependent samples t-test when the unit of analysis is compared over time, especially in a pre-post setting.All of these tests are also illustrated with R Commander instruction and interpretation of the t-statistic and statistical significance.