collect the data for the alternate source of energy, solar energy and a) Find mean, median and mode b) Draw less than ogive graph.
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The median value of a series may be determinded through the graphic presentation of data in the form of Ogives.This can be done in 2 ways.
1. Presenting the data graphically in the form of 'less than' ogive or 'more than' ogive .
2. Presenting the data graphically and simultaneously in the form of 'less than' and 'more than' ogives.The two ogives are drawn together.
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