The age (in years) of360 patients treated in the hospital on a particular day are given below.

Draw a histogram for the above data.

Note that, class intervals have varying base widths. This changes how we generally draw a histogram.

There is a need to find length of rectangles for each class interval because length of rectangle will determine y-axis now, while class interval will be represented on the x-axis.

Length of the rectangle is given by,

Where C = minimum class width of the data set.

Here, note from the table below that C = 10.

Thus, histogram can be drawn following the given table. Table makes our observation and calculation clearer and ensures accuracy of the final answer.

The histogram is as follows: