"the impact of women entrepreneurs on economic development of rwanda" case study of women entrepreneur in expo 2010 organized by rwanda private sector federation.

3.3 Sampling techniques

3.3.1 Area of study

In the study, the area of study is the area which the research will be carried out. The research was carried out in Expo 2010 held at Rwanda Private Sector Federation at Gikondo.

3.3.2 Population

Grinnell and willaims (1990:118), defines population as a totality of persons or objects which the study is targeting.

The population of study was 150 women entrepreneurs where the sample size of 60 women entrepreneurs were determined using the formula of slovin (1960) and the study targeted women entrepreneurs who live in Rwanda because the study was to find the contribution of women entrepreneurs in the development of Rwanda foreigner women entrepreneurs were not concerned by the study.

3.3.3 Sample size determination

Sampling is the process which involves taking a part of the population, making observation on these representative groups and then generalizing the findings to the bigger population (ary 1991).

To determine the ideal sample size for a population, Slovin's formula is used which is

n = N / (1 + (N*e²))

Where:
n = number of samples
N = total population
e = margin of error

N= 150 women entrepreneurs in expo 2010

E=margin error of 10% or 0.1. According to Cochran (1977), 90% confidence interval is more reliable.

Sample size =150/ (1+150*0.1²) = 60 women entrepreneurs