The chance of rain, shown on a weather app, is given as a percentage. This is a relative frequency, based on real data. The chance of rain, shown on a weather app, is given as a percentage. This is a ...

a priori Probability: the probability that we determine from knowing the process by which the uncertain event happens (by logically examining existing information). Certain Event: event that is sure ...

As is well known, the normal distribution is a key tool in probability and statistics. It can be described as a distribution that obeys a universal rule derived from one of the most important theorems ...

An animated guide to probability explains how to express probability as fractions and percentages based on the ratio of the number of ways an outcome can happen and the total number of outcomes.

Fifth-graders at Moreland Hills Elementary School recently held a Probability Carnival featuring games of chance they created. Students would assess theoretical versus experimental probability, and ...

Vol. 26, No. 2/3, Special Issue on the Risks of Terrorisum (March/May 2003), pp. 121-136 (16 pages) When strong emotions are involved, people tend to focus on the badness of the outcome, rather than ...