After reading this chapter, you should be able to

14.1 Define descriptive statistics and state two reasons why it is important to summarize data.

14.2 Identify and construct tables and graphs for frequency distributions.

14.3 Summarize and interpret the mean, median, and mode to describe data.

14.4 Summarize and interpret the range, variance, and standard deviation to describe data.

14.5 Compute the mean, median, mode, variance, and standard deviation using SPSS.

14.6 Identify and construct graphs used to display group means and correlations.

14.7 Compute and interpret Cronbach’s alpha and Cohen’s kappa to estimate reliability.

14.8 Compute Cronbach’s alpha and Cohen’s kappa using SPSS and justify the assumptions required for computing each test.