Package to determine the correct sample size for a survey
Every survey needs an ideal number of responses according to the survey's target audience. This is where a statistical calculation that determines the desired sample size comes in.
The calculation is based on three important variables: population size, confiability rate and margin of error.
- N: The population size
- z: Score calculated from the confiability rate
- e: Margin of error
- p: Constant, generally 0.5
More information here.
Install the package:
npm install @gabrielrufino/samplesizeCalculate the sample size:
import SampleSize from '@gabrielrufino/samplesize'
const size = SampleSize.calculate({
population: 3000,
confidence: SampleSize.confidences['90%'],
errorMargin: 0.05,
})
console.log(size) // 250UNLICENSED