Online Quantum textbook from the Journal of Chemical Education

Journal of Chemical Education (J Chem Ed)

Writing Guide for Chemistry (Oregon State University)

Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results by Barry N. Taylor and Chris E. Kuyatt

Glossary of statistics from Statsoft.

The Basics of Error Analysis (University of Michigan)

Fundamental Physical Constants from NIST

Statistics for Analytical Chemistry (Widener University)

Excel Tutorials from Clemson University, Physics Department