https://github.com/gabrielrufino/samplesize

📊 Package to determine the ideal sample size for a survey
https://github.com/gabrielrufino/samplesize

math mathmatics samplesize statistics

Last synced: about 1 year ago
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📊 Package to determine the ideal sample size for a survey

• Host: GitHub
• URL: https://github.com/gabrielrufino/samplesize
• Owner: gabrielrufino
• License: unlicense
• Created: 2021-10-16T14:17:19.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2025-04-16T22:05:30.000Z (about 1 year ago)
• Last Synced: 2025-04-17T10:13:24.759Z (about 1 year ago)
• Topics: math, mathmatics, samplesize, statistics
• Language: TypeScript
• Homepage: https://samplesize.gabrielrufino.com
• Size: 1.29 MB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          


  

  
Sample Size


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Package to determine the correct sample size for a survey

### What is Sample Size?

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](https://www.surveymonkey.com/mp/sample-size-calculator/).

### Getting started

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

```

### License

UNLICENSED