3.7 Population determination
As it has been indicated above, given the width of this topic
under study, the population is also wide as it is located in rural areas where
agriculture dominates. Despite the fact that the population under this study is
derived from a selected farmers and local leaders
3.8 Sample size and
selection techniques
While selecting the sample size of the study; the researcher
purposively consulted 7 respondents particularly as local leaders and 89 local
farmers. Data was collected from the study population due to the reasons of
necessary and convenience.
To determine the sample size of the study, we have used the
technique of corrected sample proposed by Alain Bouchard and
since the population under study does not constitute homogeneous group then
stratified sampling techniques was applied so as to obtain a representative
sample
3.8.1 Stratified sampling
The study population was stratified into two strata; one
stratum was comprised of local leaders and local farmers around the sector.
From these two strata, the researcher used both simple random and purposive
sampling techniques as these enabled us to select respondents who could provide
the information needed for the study. In this study Local farmer's selection was done using simple
random sampling from the list of households available at the cell level. While
purposive sampling in this study was used to select local leaders
From the
official website of BURERA District, the total number of population of CYANIKA
sector is 29,907. From this number, we have calculated our
sample size using Alain Bouchard formula. For the sample size,
we have used the technique of corrected sample proposed by Alain
Bouchard quoted by MBONYINKEBE, 2011. In this formula, the author
suggest that if the population is greater than ten thousand, the corrected
sample is ninety six (96) individuals whereas for the population less than one
hundred thousand, the sample will be calculated by the following formula:
Where nc = corrected sample size
N=Total population of the sector n=corrected
sample
In our case, N= 29.907, n=96
Then, as   NC=  =   = 95.692  96 persons
Therefore, the study will focus on 96 respondents including 7
local leaders and the rest will be local farmers the sample provides an
adequate figure for undertaking statistical analysis that falls within the
defined confidence levels in the limited boundaries of CYANIKA Sector in BURERA
District
3.9 Allocation of sample
(quantitative survey) per cell
As our study concerns people from CYANIKA sector, made up of 6
cells, we have calculated the sample size by cell using Javeau Formula as
follows
ni=????*????/??
With ni =sample size by cell
Ni=population by cell nc =corrected sample
N=population of CYANIKA sector. Then from the number of
population per cell, we have calculated the sample size per cell
Table1: Allocation of sample (quantitative survey) per
cell
|
No
|
Cells
|
Population
|
Sampling by Population
|
Household
|
Sampling by HH
|
|
1
|
GASIZA
|
5176
|
13
|
1089
|
13
|
|
2
|
KABYINIRO
|
6128
|
15
|
1279
|
16
|
|
3
|
GISOVU
|
5412
|
17
|
1485
|
18
|
|
4
|
KAGITEGA
|
6697
|
17
|
1372
|
17
|
|
5
|
KAMANYANA
|
6812
|
20
|
1722
|
21
|
|
6
|
NYAGAHINGA
|
7841
|
14
|
814
|
10
|
|
TOTAL
|
33,217
|
96
|
7,761
|
96
|
| 
