The following data shows the average age of men in various countries in a certain year:

Country India Nepal China Pakistan U.K U.S.A

Average age
(in years) 55 52 60 50 70 75

Represent the above information by a bar graph.

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Solution

To represent the given data by a vertical bar graph, we first draw horizontal and vertical axes. Let us consider that the horizontal and vertical axes represent the countries and the average age of men’s respectively. We have to draw 6 bars of different lengths given in the table.

At first we mark 6 points in the horizontal axis at equal distances and erect rectangles of the same width at these points. The heights of the rectangles are proportional to the average age of men’s in different countries.

The vertical bar graph of the given data is following:

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Country	India	Japan	Britain	Ethiopia	Cambodia
Lifeexpectancy (in years)	65	80	75	50	45

Country	Japan	India	Britain	Ethiopia	Cambodia
Life expectancy (in years)	76	57	70	43	36

Average age of the people of a country is shown in the following table:

$\begin{matrix} Age (Years) & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 People & 30 & 32 & 15 & 12 & 9 \end{matrix}$

Find out mean age by Direct Method.

Age (in Years)	20−29	30−39	40−49	50−59	60−69
Workers	10	8	6	4	2

Age (in years)	10-20	20-30	30-40	40-50	50-60	60-70
No. of patients	60	42	55	70	53	20

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Country	India	Nepal	China	Pakistan	U.K	U.S.A
Average age (in years)	55	52	60	50	70	75