# Scientific Bayesian Average Calculator

> The first scientifically validated Bayesian weighted average calculator. It accurately computes Bayesian weighted averages using either pre-calculated average metrics or the complete dataset from the table.

Canonical page: [https://chrome-stats.com/d/sci-bayesian-average-calc](https://chrome-stats.com/d/sci-bayesian-average-calc)

## Overview

- **ID:** `sci-bayesian-average-calc`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Removed
- **Publisher:** Ancient Olympic Gods and Chuds Inc.
- **Rating:** 4.64 / 5 (11 ratings)
- **Version:** 1.0
- **Last updated:** 2025-02-17
- **First published:** 2025-02-15
- **Size:** 20 KB
- **Data as of:** 2025-08-04
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/sci-bayesian-average-calc/)

## Description

Simply the Correctly Implemented Bayesian Average Calculator

To calculate the Bayesian average based on the given dataset only, leave both the <strong>system’s mean</strong> and the <strong>system’s average number of ratings</strong> fields empty. The first row will return the same value as the average, but filling in two or more fields will shift results closer to the dataset’s average.

To calculate the Bayesian average based on a predefined system’s mean, set both the <strong>system’s mean</strong> and the <strong>system’s average number of ratings</strong>, then press the <strong>Update Global Constraints</strong> button.
You can also adjust the valid limits for ratings.

The addon works well with negative numbers.
<strong>Constraints:</strong>
  • <strong>Min possible rating:</strong> Both positive and negative floats.
  • <strong>Maximum possible rating:</strong> Both positive and negative floats, must be greater than the minimum possible rating.
  • <strong>System’s mean:</strong> Both positive and negative floats, must be between the minimum and maximum possible rating or left empty (if not empty, the system’s average number of ratings must also be a non-empty positive number).
  • <strong>System’s average number of ratings:</strong> Only positive numbers or left empty (if not empty, the system’s mean must also be non-empty).  

For constraints to be applied, press the <strong>Update Global Constraints</strong> button.
The fields of the table will be calculated automatically.

<strong>Fields:</strong>
  • <strong>Link/Name:</strong> A link to the product, movie, etc., or its name.
  • <strong>Average rating:</strong> Both positive and negative floats, according to the limits set above for the given item.
  • <strong>Number of ratings:</strong> A positive integer representing the number of ratings for the given item.
  • <strong>Bayesian average:</strong> The calculated Bayesian average result for the given item.

<strong>Copy All Info</strong> - allows you to easily copy data in CSV format.

Methodology used: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/37555ef81144423005bb25f0bbfd874ebbe8ca100cad3c6955f7b2c117c414bf/https%3A//arpitbhayani.me/blogs/bayesian-average/%23the-formula" rel="nofollow">https://arpitbhayani.me/blogs/bayesian-average/#the-formula</a>

## Permissions and access

### Permissions

- `storage`
- `tabs`
- `clipboardWrite`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension is not longer available in the store

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/sci-bayesian-average-calc)