STAT 101 Chapter Notes - Chapter 1: Bar Chart, Time Series, Categorical Variable

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Usually recorded in a unit of measurement. Categorical variable a variable categorized with a number not connected to the data but as a label. Quantitative variable a variable categorized by units. Individuals objects described by a set of data. Distribution of a variable what values it takes and how often it takes these values. Pie charts distribution of a categorical variable as a pie whose slices are sized by counts or percents of the categories. Bar graph distribution of a categorical variable as a bar whose height are sized by counts or percents of the categories. Step 1: divide the range of data into equal class widths. Step 2: count individuals in each class. Distribution of a categorical variable lists the categories and gives either the count or the percent of who falls in each category.

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