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Environmental Systems Research

Table 3 Stratified random sampling calculation for sample size

From: Increasing the publicness of riversides as public space development on Kebena River, Addis Ababa, Ethiopia

Factors/variables

Values

Remarks

The population size of the sample area (total population size of Kirkos and Yeka sub-cities)

896,001

Estimated for 2020

Margin of error

10%

 

Confidence level

90%

 

Z-score

1.65

The z-score/ z-value for 90% confidence

Sample size

69

 
  1. Stratified random sampling was implemented to identify the sample size for the questionnaire with a 10% margin of error and 90% confidence level
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