Dr. James McCaffrey presents a complete end-to-end demonstration of linear regression with two-way interactions between ...

Learn what residual standard deviation is, how to calculate it in regression analysis, and why it's crucial for measuring predictability and goodness-of-fit in data modeling.

Al Toubi, K., Al Quraini, M. and Al Hubaishi, A. (2025) Oman Provisional Climate Normal Based on the Observation from 2010 to 2021. Atmospheric and Climate Sciences, 15, 816-840. doi: 10.4236/acs.2025 ...

Background Tobacco price is an important determinant of smoking behaviour. Using electronic point-of-sales (EPOS) data, this study assesses purchase price of factory-made cigarettes (FMC) and ...