The following table shows the performance of 150 candidates in an Intelligence test. Draw a histogram and frequency polygon for this distribution

GIVEN.

⇒ First draw histogram of given table

As the data is in continuous form

⇒ Mark class interval along X axis on uniform scale

⇒ Mark frequency along Y axis on uniform scale

⇒ Construct rectangles with class intervals as base and

corresponding frequencies as height.

⇒ Take out the midpoints of each interval and imagine 2

midpoints at 1^st and last join all midpoints and imaginary midpoints to get frequency polygon.