Practical Statistics for Data Scientists: 50 Essential Concepts, Peter Bruce, Andrew Bruce, Peter Gedeck, 2020 (O'Reilly Media) - Provides a practical approach to statistical concepts relevant for data science and machine learning, including confidence intervals for means.
scipy.stats Reference Guide, SciPy Developers, 2024 - Official documentation for statistical functions in SciPy, providing details on critical value calculations (ppf) and confidence interval functions like t.interval.