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The table below gives the figures for the 2009 population census per county for the central region of Kenya.

The table below gives the figures for the 2009 population census per county for the central region of Kenya.

(a) (i) Besides bar graphs, name three other methods that can be used to represent the above data.
(ii) Draw a simple bar graph to represent the data in the table above.
Use a scale of 1cm to represent 200,000 persons.
(iii) State four advantages of using bar graphs to represent statistical data.
(b) Calculate the population density for Kiambu County, given that its area is 2543.4 square kilometers.
(c) Give two reasons why census is necessary.
(d) Explain four reasons for the high population density in Kiambu County.

Answers

(i) Other methods of data representation.
- Divided rectangles
- Proportional circles
- Pie chart



(iii) Advantages of using bar graphs
- They are easy to construct.
- Bars and individual units are suitable to present population of countries.
- It is easy o compare quantities.
- Give good visual impression.

(b) Population density of Kiambu
1,623,282 = 638 persons per square kilometers
2543.4

(c) Reasons why census is necessary.
- Helps to plan for provision of basic facilities.
- Helps to plan for jobs.
- Helps to assess the resources available.
- Helps to assess the resources available and existing population (Economic / Social)
- Helps to decide administrative areas.

(d) Reasons for the high population density in Kiambu County.
- Fertile volcanic soils which favour high agricultural production.
- Cool climate which favours growth of commercial crops like tea and coffee.
- Adequate water supply for domestic use and for irrigation of crops.
- Nearness to Nairobi.
- Availability of health facilities- reduced death rates and improved nutrition.
- The county receives high rainfall in most areas which support agriculture and livestock farming.

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Kavungya answered the question on November 15, 2022 at 06:51

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