A period of time that has passed, usually between a given starting time and ending time

element

A member of or an object in a set

empty set

The empty set, Ø, is the set that has no members

end point convention

In histograms, one needs to decide where to count values that are on the exact boundary between two intervals: either in the left or in the right interval. Let readers of the histogram know which side is chosen

equally likely

In probability, when there are the same chances for more than one event to happen, the events are equally likely to occur. For example, if someone flips a coin, the chances of getting heads or tails are the same. There are equally likely chances of getting heads or tails

escapees

A complex number is an escapee of a Julia Set if its orbit, a sequence of complex numbers generated by successive iterations of a given function, is unbounded.

estimate

The best guess arrived at after considering all the information given in a problem

Euclidean algorithm

The method for finding remainders by multiplying the divisor by the quotient and subtracting that amount from the number being divided. For example, when finding the remainder for 25 divided by 4, the quotient is 6, so one multiplies 6 times 4 (giving 24) and then subtracts 24 from 25, leaving 1 as the remainder

event

In probability, an event is a set of outcomes from a given experiment.

expected value

The amount that is predicted to be gained, using the calculation for average expected payoff

experimental probability

The chances of something happening, based on repeated testing and observing results. It is the ratio of the number of times an event occurred to the number of times tested. For example, to find the experimental probability of winning a game, one must play the game many times, then divide the number of games won by the total number of games played

exponent

An expression of the number of times that a base is used as a factor