The age (in years) of 360 patients treated in a hospital on a particular day are given below. Draw a histogram and a frequency polygon on the same graph to represent the given data.

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Solution

Step 01 - Construct the histogram.

Consider the class intervals, that is, age in years on the X – axis and number of patients on the Y- axis and draw rectangles which provide the required histogram.

Step 02 - Construct the frequency polygon.

To construct a frequency polygon, take 0 – 10, 10 - 20, …, 60 – 70 as class intervals having class marks 5 and 75 with frequency zero and join the midpoints of rectangles.

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Similar questions

Age in years	10−20	20−30	30−40	40−50	50−60	60−70
Number of patients	90	40	60	20	120	30

Age (in years):	10-20	20-30	30-40	40-50	50-60	60-70
No.of Patients:	90	50	60	80	50	30

The following are the ages of 300 patients getting medical treatment in a hospital on a particular day:

Age (in years)	10−20	20−30	30−40	40−50	50−60	60−70
Number of patients	60	42	55	70	53	20

Form a 'less than type' cumulative frequency distribution. [CBSE 2013]

\begin{matrix} Age in years & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 & 60 - 70 Number of patients & 90 & 40 & 60 & 20 & 120 & 30 \end{matrix}

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