We covered Ch. 2-1 Review and Preview (Center, Variation, Distribution, Outliers, Times); Ch. 2-2 Frequency Distributions (Frequency distribution, lower class limits, upper class limits, class boundaries, class midpoints, class width, relative frequency distribution, cumulative frequency distribution); Ch. 2-3 Histograms (Histograms, relative frequency histogram, bell-shaped distribution, skewness, right and left skew, normal distribution); Ch. 2-4 Graphs That Englighten and Graphs That Deceive (Graphs that enlighten, correlation coefficient, clusters and gaps, time-series graph, dot plots, stem plots, bar graphs, Pareto plots, pie charts, frequency polygon, ogive; graphs that deceive [nonzero axis, pictographs).