X-bar in statistics is a symbol for the sample mean. Given a sample of n observations of numbers, the sample mean is found by adding up all of the observations, then dividing by the total …

Learn what sigma is, understand its origin, and discover what it represents in mathematics. Explore the meaning of sigma as summation and the...

Greek symbols are used in math and science due to the fact that the Greek alphabet heavily influenced European mathematics.

Venn Diagram Sets and Symbols Venn diagrams are used to compare sets. Venn Diagram sets are collections of items. These items can be symbols, actual objects, numbers, or anything else.

Understand what U in math is. Learn the universal set definition and discover what the universal set symbol is. Understand what subsets of universal sets are.

What is a frequency distribution? See a frequency distribution table. Learn how to create a frequency distribution in statistics & its representation on plots.

Learn what population proportion is and understand its formula. Discover the population proportion symbol and find out how population proportion is estimated.

Learn the meaning of delta symbol and how the Greek letter delta is defined in math and science. See the different uses of capital and lowercase...

Learn about sample variance and compare it to population variance. Explore how to find sample variance using the formula and see the sample variance symbol.

Learn about inequality signs in math by understanding what inequality symbols are, when to use them, and what the less than sign and greater than sign look like.