21 relations: Arithmetic mean, Box plot, Descriptive statistics, Epidemiology, Finance, Five-number summary, Interquartile range, John Tukey, Median, Midhinge, Outlier, Percentile, Probability density function, Quantile, Range (statistics), Robust statistics, Sociology, Standard deviation, Statistics, Summary statistics, TI-83 series.

## Arithmetic mean

In mathematics and statistics, the arithmetic mean (stress on third syllable of "arithmetic"), or simply the mean or average when the context is clear, is the sum of a collection of numbers divided by the number of numbers in the collection.

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## Box plot

In descriptive statistics, a box plot or boxplot is a method for graphically depicting groups of numerical data through their quartiles.

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## Descriptive statistics

A descriptive statistic (in the count noun sense) is a summary statistic that quantitatively describes or summarizes features of a collection of information, while descriptive statistics in the mass noun sense is the process of using and analyzing those statistics.

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## Epidemiology

Epidemiology is the study and analysis of the distribution (who, when, and where) and determinants of health and disease conditions in defined populations.

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## Finance

Finance is a field that is concerned with the allocation (investment) of assets and liabilities (known as elements of the balance statement) over space and time, often under conditions of risk or uncertainty.

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## Five-number summary

The five-number summary is a set of descriptive statistics that provide information about a dataset.

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## Interquartile range

In descriptive statistics, the interquartile range (IQR), also called the midspread or middle 50%, or technically H-spread, is a measure of statistical dispersion, being equal to the difference between 75th and 25th percentiles, or between upper and lower quartiles, IQR.

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## John Tukey

John Wilder Tukey (June 16, 1915 – July 26, 2000) was an American mathematician best known for development of the FFT algorithm and box plot.

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## Median

The median is the value separating the higher half of a data sample, a population, or a probability distribution, from the lower half.

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## Midhinge

In statistics, the midhinge is the average of the first and third quartiles and is thus a measure of location.

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## Outlier

In statistics, an outlier is an observation point that is distant from other observations.

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## Percentile

A percentile (or a centile) is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations fall.

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## Probability density function

In probability theory, a probability density function (PDF), or density of a continuous random variable, is a function, whose value at any given sample (or point) in the sample space (the set of possible values taken by the random variable) can be interpreted as providing a relative likelihood that the value of the random variable would equal that sample.

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## Quantile

In statistics and probability quantiles are cut points dividing the range of a probability distribution into contiguous intervals with equal probabilities, or dividing the observations in a sample in the same way.

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## Range (statistics)

In statistics, the range of a set of data is the difference between the largest and smallest values.

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## Robust statistics

Robust statistics are statistics with good performance for data drawn from a wide range of probability distributions, especially for distributions that are not normal.

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## Sociology

Sociology is the scientific study of society, patterns of social relationships, social interaction, and culture.

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## Standard deviation

In statistics, the standard deviation (SD, also represented by the Greek letter sigma σ or the Latin letter s) is a measure that is used to quantify the amount of variation or dispersion of a set of data values.

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## Statistics

Statistics is a branch of mathematics dealing with the collection, analysis, interpretation, presentation, and organization of data.

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## Summary statistics

In descriptive statistics, summary statistics are used to summarize a set of observations, in order to communicate the largest amount of information as simply as possible.

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## TI-83 series

The TI-83 series is a series of graphing calculators manufactured by Texas Instruments.

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First quartile, Lower quartile, Q2 (statistics), Quartil, Quartiles, Second quartile, Third quartile, Upper quartile.