# S1 Glossary of Terms

For those times you need to convert what the question's asking into plain English.

With a couple of useful diagrams too. [I think]

There are one or two typos which I'll correct when I've got a spare moment.

- Created by: Luke Berry
- Created on: 03-04-10 19:17

First 227 words of the document:

Statistics Glossary

Numerical Methods

Population a set of values incorporating every value measured.

Sample a set of values selected from the much larger population.

Measure of average the mean is usually preferred as the MOA.

, , ,...,

Mean an estimation of the average. =

Mode the value which occurs most frequently.

Median the middle value of a string of ordered values.

Ordered implies that the values are rearranged in ascending order.

Outliers unusually large or unusually small values when compared to other values in the data set.

Measure of spread the standard deviation if usually preferred as MOS.

Standard deviation the measure of the average deviation of the values from their mean.

Population variance the square of the population standard deviation.

Range the difference between the highest and the lowest values.

Interquartile range (IQR) the difference between the upper and lower quartiles.

Lower quartile the median of the ordered values to the left of the median.

Upper quartile the median of the ordered values to the right of the median.

Frequency distribution a list of integer values together with their corresponding frequencies.

Grouped frequency distribution a list of continuous classes together with their corresponding

frequencies.

Linear scale if the frequency increases as the class increases.

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