Simple histogram: Use this option to visualize frequencies of scores for a single variable. Stacked histogram: If you have a grouping variable (e.g., whether people worked hard or wished upon a star) you can produce a histogram in which each bar is split by group. In this example, each bar would have two colors, one representing people who worked hard and the other those who wished upon a star. This option is a good way to compare the relative frequency of scores across groups (e.g., were those who worked hard more successful than those who wished upon a star?). Frequency polygon: This option
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