The data here shows an hypothetical age distribution of the population of a town in...
The data here shows an hypothetical age distribution of the population of a town in Nigeria.
| Sex | Age in years | |||
| 10 and below | 11-14 15-3 | 36 - 64 | 65 and above | |
| Male | 1350 | 2275 1135 | Y | 3250 |
| Female | 2650 | 2725 1365 | 4265 | Z |
| Total | 4000 | X 2500 | 7500 | 6000 |
From this data, calculate:
(a) X, Y, Z.
(b) The total population of the town.
(c) The difference between the population of male and female aged 14 and below.
(d) The percentage of the population aged 14 and below.
(e) The dependency ratio in the town.
Explanation
(a) X = Male (2275) + Female (2725) 5000
Y = Total - Female = 7500 - 4265 = 3235
Z = Total - Male = 6000 - 3250 = 2750
(b) Total population:
10 and above: 4,000
11 - 14 5,000
15 - 35 2,500
36 - 64 7,500
65 & above6,000
Total25,000
(c) Females of 14 years and below = 2650 + 2725 = 5375
Males of 14 years and below = 1350 + 2275 = 3625
Difference between the population of male and female aged 14 and below = 5375 - 3625 = 1750
(d) Percentage of population aged 14 years and below:
Female aged 14 years and below plus male aged 14 years and below. 5375 + 3625 = 9000 or 4000 + 5000 = 9000
= \(\frac{9000}{25000} \times \frac{100}{1}\) = 36%
(e) Dependency ratio =
Population of Less than 14 years +population of more than 65 years
population of 15 - 35 + population of 36 - 64 years
= \(\frac{9000 + 6000}{2500+7500} = \frac{15,000}{10000}\) = \(\frac{3}{2}\) = 3:2