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Question

The following table gives the distribution of 40 students across the different levels of Intelligent Quotient. Draw the histogram for the data.

IntelligentQuotient(IQ)60707080809090100100110110120120130Number of students3567982

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Solution

Along the horizontal axis, we represent the class intervals of IQ on some suitable scale.
The corresponding frequencies of the number of students are represented along the Y-axis on a suitable scale.
The given intervals start with 60 - 70. It means that there is some break () indicated near the origin to signify the graph is drawn with a scale beginning at 60.
Now, we draw rectangles with class intervals as the bases and the corresponding frequencies as heights.

A histogram of the given distribution is given below.



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