What is Frequency Polygons? A frequency polygon is a type of line graph where the class frequency is plotted against the class midpoint and the points are joined by a line segment creating a curve. The curve can be drawn with and without a histogram. A frequency polygon graph helps in depicting the highs and lows of frequency distribution data. To obtain the curve for a frequency polygon, we need to find the classmark or midpoint from the class intervals. What are the Characteristics of Frequency Polygons? A frequency polygon graph is considered as a closed dimensional figure of a line segment joining the midpoints of the given class intervals. The graph can either be drawn with a histogram or without a histogram. The first point is on the x-axis where y = 0 and is placed in the middle of the interval which precedes the first class interval.
確定! 回上一頁