Statistics 2.1

Frequency distribution

lists each category of data and the number of occurrences for each category of data

Relative frequency

proportion (or percent) of observations within a category and is found using the formula

relative frequency distribution

lists each category of data together with the relative frequency.

bar graph

constructed by labeling each category of data on either the horizontal or vertical axis and the frequency or relative frequency of the category on the other axis. Rectangles of equal width are drawn for each category. The height of each rectangle represents the category’s frequency or relative frequency.

Pareto chart

a bar graph in which bars are drawn in decreasing order of frequency or relative frequency.

Pie chart

a circle divided into sectors. Each sector represents a category of data. The area of each sector is proportional to the frequency of the category.