Statsmodels is an open-source Python library designed for estimating and testing statistical models. It provides classes and functions for conducting statistical tests, performing data exploration, and building models such as linear regression, generalized linear models, time series analysis, and more. Statsmodels is widely used in econometrics, statistics, and data science for its powerful set of tools to analyze and interpret data.

Features of Statsmodels:

• Offers a wide range of statistical models including linear, logistic, and generalized linear models.
• Provides extensive tools for time series analysis and forecasting (ARIMA, SARIMAX, VAR, etc.).
• Includes hypothesis testing, statistical tests, and diagnostic tools.
• Seamlessly integrates with libraries like NumPy, SciPy, and pandas.
• Supports advanced econometric and statistical methods.
• Provides comprehensive result summaries and statistical inference details.
• Open-source and actively maintained by the scientific Python community.

To check the installed version of Statsmodels on Ubuntu 22.04, run these commands in your environment:

$ sudo su
$ sudo apt update
$ cd /opt/statsmodels
$ source ~/venv/statsenv/bin/activate
$ python -c "import statsmodels.api as sm; print('statsmodels', sm.__version__)"

Disclaimer: Statsmodels is released under the BSD License and is maintained by the open-source community. Users are responsible for ensuring correct usage in their specific applications. The developers do not take responsibility for any consequences arising from its use. Always refer to the official documentation for the most accurate and up-to-date information.