Question

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Answer 1

Answer:

Mark the class intervals along the X-axis and the frequencies along the Y-axis with appropraite scale shown in the Figure. Draw a histogram for the given data. Now, mark the mid points of the upper sides of the consecutive rectangles. Also we take the imagined class interval (−10)−0 and 60−70. The mid points are joined with the help of a ruler. The ends of the polygon are joined with the mid points of the imagined class intervals (−10)−0 and 60−70. Now we get the frequency polygon.