ANOVA > Nested Model Contents: What is a Nested Model? Nested Factors Nested ANOVA Nested vs. Crossed What is a Nested Model? Very simply, “nested” means that one model is a subset of another. For example, take a model for…

# Multiset & Multiplicity: Simple Definition & Examples

Statistics Definitions > A multiset in mathematics is a generalization of the concept of a set. It’s a collection of unordered numbers (or other elements), where every element x occurs a finite number of times. The difference between sets and…

# Random Walk

Statistics Definitions > A random walk is a sequence of discrete, fixed-length steps in random directions. Random walks may be 1-dimensional, 2-dimensional, or n-dimensional for any n. A random walk can also be confined to a lattice. The Simplest Random…

# Origin (mathematics)

Statistics Definitions > The origin (mathematics) is the reference point we use to define all other points; a fixed point we refer to when noting the geometry of a space. It is often denoted by O, and the coordinates are…

# Coefficient Definition: Different Types in Statistics and Math

Statistics Definitions > Coefficient Definition Contents: Coefficient Definition in Statistics Coefficient Definition in General Mathematics Coefficient Definition: Statistics A coefficient measures a certain property or characteristic of a data set, phenomenon, or process, given specified conditions. You’ll come across many…

# Ill-Conditioned

Statistics Definitions > A mathematical problem or series of equations is ill-conditioned if a small change in the independent variable (input) leads to a large change in the dependent variable (output). This can lead to computational problems. For example, if…

# TI 89 Calculus: Basic Functions in Simple Steps

Calculus > TI 89 Calculus TI 89 Calculus Contents (Basic Features): How to Graph a Function Intersection and Trace on the TI-89 Find Limits on the TI 89 Magnify Graphs With the TI-89 ZoomBox feature Create a Table of Function…

# Memoryless Property

Probability > The memoryless property (also called the forgetfulness property) means that a given probability distribution is independent of its history. Any time may be marked down as time zero. If a probability distribution has the memoryless property the likelihood…

# Nonlinearity: Definition, Examples

Statistics Definitions > A nonlinearity is a relation between data points that can’t be condensed into a neat linear graph. Nonlinearity vs. Linearity To understand nonlinearity we first need to define what it means for relationship between two variables to…

# Reduce Sample Size

Finding Sample Sizes > In many cases, finding an appropriate sample size results in a sample size that’s too large. You may not have the resources to conduct a large study, or ethical reasons may prevent testing on a large…