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Question

# The heights of 75 stucents in a school are given below: Height (in cm)130−136136−142142−148148−154154−160160−166Number of students9121823103 Draw a histogram to represent the above data.

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Solution

## Sol: The frequency distribution is as below: Height (in cm) 130-136 136-142 142-148 148-154 154-160 160-166 No. of students 9 12 18 23 10 3 In the class intervals, if the upper limit of one class is the lower limit of the next class, it is known as the exclusive method of classification. Clearly, the given frequency distribution is in the exclusive form. We take class intervals, i.e. height (in cm) along x-axis and frequencies i.e. the number of students along the y-axis. So we get the required histogram. Since the scale on x-axis starts at 130, a kink (break) is indicated near the origin to show that the graph is drawn to scale beginning at 130

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