Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Mode, Mean and Median
Find a quick, concise explanation of a mode. An example is given and clearly explained. Mean and median are also explained.
Science Struck
Science Struck: Types of Skewed Distribution With Real Life Examples
Explains what is meant by a skewed distribution, describes the two types, and gives examples.
University of Glasgow
Steps Statistics Glossary: Sample Mean
The definition of a sample mean is provided along with the symbol commonly used for it and an example to show the formula in action. A link to "expected value" - a related topic - is provided.