Measures of Central Tendency

Mode

The most frequent score or observation in a data set.

Median

The middle score in a sorted data set; if there is an even number of observations, it is the average of the two middle numbers.

Mean

The average of a data set, calculated by dividing the sum of all scores by the number of scores.

Outlier

A value significantly higher or lower than the rest of the data points in a data set.

Trimmed Mean

A mean calculated after removing a specified percentage of the lowest and highest scores to reduce the impact of outliers.

Central Tendency

A statistical measure that identifies a single score as representative of an entire distribution.

Nominal Data

Categorical data without a defined order or ranking.

Extreme Score

A data point that is far removed from other observations and can skew the results of statistical measures.

Resistance to Outliers

A property of a measure of central tendency that indicates its ability to remain stable despite extreme scores.

Interval Data

Numerical data where the difference between values is meaningful, but there is no true zero.