Dictionary

In probability, the formula for calculating the union of mutually exclusive events is:P(A U B) = P(A) + P(B)This formula can only be applied to mutually exclusive events, while for events that are not mutually exclusive, the intersection of the outco...

A question in which the respondent chooses only between two possibilities. This group also includes those questions in which rounding the answer implies the answer "yes".

The hypothesis against which the null hypothesis is tested. It is denoted by H₁ or H_a. Unlike the null hypothesis, there may be multiple alternative hypotheses. They claim that there is a difference between the parameters. They ...

A measure of central tendency. It is calculated using the formula It is most useful when the data have a symmetrical distribution and do not have extreme values. The term arithmetic mean is often understood as the arithmetic mean of a sample. It is ...

The term "average" is often used as a synonym for arithmetic mean, although strictly it may refer to any measure of central tendency.