A frequency polygon is a graphic representation of the frequency of scores.

A frequency polygon is a graphic representation of the frequency of scores.

• A. Bar chart of frequencies
• B. Graphic representation of the frequency of scores
• C. Cumulative distribution
• D. Pie chart of categories

Answer: (B)

A frequency polygon is a line graph used to show how often scores occur across consecutive value intervals. You plot each interval’s midpoint on the horizontal axis and its frequency on the vertical axis, place a point at each midpoint with height equal to the frequency, and connect the points with straight lines. This creates a graphic representation of the frequency of scores, highlighting the distribution’s shape. Why this best fits: the line-connecting representation specifically conveys frequencies across score ranges, unlike a bar chart, which uses bars and is more characteristic of a histogram; a cumulative distribution shows running totals rather than individual frequencies; and a pie chart displays proportions of categories instead of a distribution over scores.

A frequency polygon is a line graph used to show how often scores occur across consecutive value intervals. You plot each interval’s midpoint on the horizontal axis and its frequency on the vertical axis, place a point at each midpoint with height equal to the frequency, and connect the points with straight lines. This creates a graphic representation of the frequency of scores, highlighting the distribution’s shape.

Why this best fits: the line-connecting representation specifically conveys frequencies across score ranges, unlike a bar chart, which uses bars and is more characteristic of a histogram; a cumulative distribution shows running totals rather than individual frequencies; and a pie chart displays proportions of categories instead of a distribution over scores.