Question

(b) Construct the frequency polygons of the following frequency distributions. Runs Scored by students of class in a cricket friendly match. a Runs scored 10-20 20-30 30-40 40-50 50-60 3 No. of students 5 8. 4 2​

Answer 1

Answer:

A frequency polygon is a line graph of class frequency plotted against class mid-point. It can be obtained by connecting the mid-points of the tops of the rectangles in the histogram or drawn as a line graph.

Answer 2

Answer:

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Draw a frequency polygon for the following frequency distribution.

CI 0−10 10−20 20−30 30−40 40−50 50−60 60−70 70−80

f 12 18 6 10 8 25 22 4

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Solution

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Construct a histogram for the given data. Mark the mid point of the tops of rectangles of histogram and join these points by line segments. To complete the polygon, mark two classes (−10 to 0) and (80 to 90). Join the end point of the line segments to the mid points of these two classes. The curve so obtained is a frequency polygon.

Step-by-step explanation:

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