Sample Size


Package to determine the correct sample size for a survey

$3

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.

$3

Install the package:

``bash
npm install @gabrielrufino/samplesize
`

Calculate the sample size:

`js
import SampleSize from '@gabrielrufino/samplesize'

const size = SampleSize.calculate({
population: 3000,
confidence: SampleSize.confidences['90%'],
errorMargin: 0.05,
})

console.log(size) // 250
``

$3

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