Frequency Polygon Worksheet
This worksheet covers the construction and interpretation of frequency polygons, suitable for Grade 9 mathematics students.
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Frequency Polygon Worksheet
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Read each question carefully and follow the instructions to construct or interpret frequency polygons.
1. What is a frequency polygon and how is it constructed from a histogram?
2. In a frequency polygon, the midpoints of the top of each bar in a histogram are joined by .
3. To close the polygon, the first and last points are connected to the on the x-axis.
4. Construct a frequency polygon for the following data representing the scores of 20 students in a math test:
Scores: 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 100
First, create a frequency distribution table with class intervals of 10 (e.g., 0-10, 10-20, etc.). Then, plot the frequency polygon.
5. Which of the following is NOT a characteristic of a frequency polygon?
It uses class midpoints.
It can be used for continuous data.
It shows cumulative frequency.
It is closed at both ends on the x-axis.
6. A frequency polygon is always drawn over a histogram.
True
False
7. Describe a scenario where a frequency polygon would be a more suitable representation of data than a histogram.