# description
The statistical operation parameter -"statistic" codes.

# concept[].definition
The [maximum](https://en.wikipedia.org/wiki/Maximal_element) value of N measurements over the stated period.

# concept[].definition
The [minimum](https://en.wikipedia.org/wiki/Minimal_element) value of N measurements over the stated period.

# concept[].definition
The [number] of valid measurements over the stated period that contributed to the other statistical outputs.

# concept[].definition
The total [number] of valid measurements over the stated period, including observations that were ignored because they did not contain valid result values.

# concept[].definition
The [median](https://en.wikipedia.org/wiki/Median) of N measurements over the stated period.

# concept[].definition
The [sum](https://en.wikipedia.org/wiki/Summation) of N measurements over the stated period.

# concept[].definition
The [variance](https://en.wikipedia.org/wiki/Variance) of N measurements over the stated period.

# concept[].definition
The 20th [Percentile](https://en.wikipedia.org/wiki/Percentile) of N measurements over the stated period.

# concept[].definition
The 80th [Percentile](https://en.wikipedia.org/wiki/Percentile) of N measurements over the stated period.

# concept[].definition
The lower [Quartile](https://en.wikipedia.org/wiki/Quartile) Boundary of N measurements over the stated period.

# concept[].definition
The upper [Quartile](https://en.wikipedia.org/wiki/Quartile) Boundary of N measurements over the stated period.

# concept[].definition
The difference between the upper and lower [Quartiles](https://en.wikipedia.org/wiki/Quartile) is called the Interquartile range. (IQR = Q3-Q1) Quartile deviation or Semi-interquartile range is one-half the difference between the first and the third quartiles.

# concept[].definition
The lowest of four values that divide the N measurements into a frequency distribution of five classes with each containing one fifth of the total population.

# concept[].definition
The second of four values that divide the N measurements into a frequency distribution of five classes with each containing one fifth of the total population.

# concept[].definition
The third of four values that divide the N measurements into a frequency distribution of five classes with each containing one fifth of the total population.

# concept[].definition
The fourth of four values that divide the N measurements into a frequency distribution of five classes with each containing one fifth of the total population.

# concept[].definition
Skewness is a measure of the asymmetry of the probability distribution of a real-valued random variable about its mean. The skewness value can be positive or negative, or even undefined.  Source: [Wikipedia](https://en.wikipedia.org/wiki/Skewness).

# concept[].definition
Kurtosis  is a measure of the "tailedness" of the probability distribution of a real-valued random variable.   Source: [Wikipedia](https://en.wikipedia.org/wiki/Kurtosis).

# concept[].definition
Linear regression is an approach for modeling two-dimensional sample points with one independent variable and one dependent variable (conventionally, the x and y coordinates in a Cartesian coordinate system) and finds a linear function (a non-vertical straight line) that, as accurately as possible, predicts the dependent variable values as a function of the independent variables. Source: [Wikipedia](https://en.wikipedia.org/wiki/Simple_linear_regression)  This Statistic code will return both a gradient and an intercept value.