After reading this chapter, you should be able to
18.1 Compare the purposes of descriptive and inferential statistics.
18.2 Describe how to interpret bar graphs, histograms, line graphs, and scatter plots.
18.3 Define and calculate the mode, median, and mean measures of central tendency,
and describe skewness.
18.4 Define and calculate the range, variance, and standard deviation measures of
variability.
18.5 Describe the measures of relative standing of scores.
18.6 Explain the use of correlation coefficients, contingency tables, and regression
analysis.