Sample Size Calculations for a Proportion for Cluster Surveys*

Version 03.08.14

 

 

Target population size:  

 

Estimated percentage in the target population with the event of interest:

 %
 
Confidence interval width:
"I'd like the sample percentage to be within
+ %
of the target
population value."
Confidence coefficient:
"I want to be
 %
confident that the confidence interval around the sample percentage captures the target population value."

How many clusters would you like to survey?

  

Estimated Design effect (DEFF):

 (use a value of 1.0 for random sampling)

 The sample size in each cluster is 
for a total sample size of

given the above estimates and decisions.

  *Assumes an equal number of samples per cluster