### 2. Surveys and Experiments

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### 1. Public Repositories

Many government and educational institutions provide access to public datasets. Examples include:

- **Kaggle**: A platform for data science competitions that also hosts numerous datasets.
- **UCI Machine Learning Repository**: A collection of datasets for machine learning research.
- **Government Open Data**: Many governments publish datasets on topics such as health, economy, and environment.


Researchers often collect numerical data through cambodia number dataset surveys, experiments, and observational studies. This method allows for the collection of targeted data relevant to specific research questions.

### 3. Web Scraping

Web scraping involves extracting data from websites. This technique can be used to gather numerical data, such as product prices, user ratings, or social media metrics.

### 4. IoT Devices

The Internet of Things (IoT) generates vast amounts of numerical data from sensors and connected devices. Examples include temperature readings from smart thermostats or activity data from fitness trackers.