Resource types:

• free website
• free website, registration required
• paid website
• free book/ebook
• paid book/ebook
• Open Access Journal

• Introduction to Statistics and Data Analysis  (Steve Brunton, University of Washington)
• Probability and Statistics  (Engineering Theory)
• Uncertainty in Engineering (1.010, 2008)  (Daniele Veneziano, Massachusetts Institute of Technology)

• Crash Course Statistics  (Adriene Hill)
• Probability & Statistics  (Aerostudents, TUDelft)
• Statistics Course  (Professor Leonard)

• Probabilistic Systems Analysis and Applied Probability (6.041)  (John Tsitsiklis, Massachusetts Institute of Technology)
• Probability Bootcamp  (Steve Brunton, University of Washington)

• Bison Academy: Random Processes (ECE 341)  (Jacob Glower, North Dakota State University)
• Facing the Data: An Introduction to Uncertainty Analysis  (Faith A. Morrison, Michigan Technological University)