Friday, November 20th, 2009
Definition of an Outlier
Description
A detailed tutorial on the definition of an outlier. Step by step tutorial including several examples of definitions of outliers for reference.
Overview
An outlier is a type of observation of statistical data. It is usually very far away from the other values in the data set, hence the name. Usually it is a number that is much smaller than the other numbers, although it could be much larger than the other numbers as well. Outliers have an equal chance of occuring in any random observation, but they are still rare. Typically when an outlier is found it means there is some sort of mistake, usually a measurement error.
Tags: chance, data, elements, equal, error, larger, measurement, mistake, numbers, observation, outlier, random, set, smaller, statistical, statistics, values
Posted in Statistics | No Comments »
Friday, October 30th, 2009
Overview of Hubble’s Law
Description
A detailed tutorial on Hubble’s law. Step by step tutorial including several examples of Hubble’s law including a visual example for reference.
Overview
Hubble’s law states that the velocity at which various galaxies are receding from the Earth is proportional to their distance from us. This law is often expressed by the equation v = H_0 * D, where H_0 is the constant of proportionality (or Hubble constant) between the distance D to a galaxy and its velocity v.
Tags: algebra, constant, distance, equation, galaxy, Hubble, law, observation, proportional, proportionality, velocity
Posted in Algebra | No Comments »
