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Glossary
These is glossary of research key terms. This glossary is intended as an aid to professionals and non-professionals who find the world of research somewhat intimidating. While it is impossible to cover all the terms that can be confusing, this document briefly defines some of the more common terms and concepts.

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Variance
1. A measure of dispersion or variability (spread), calculated by squaring the value of the standard deviation. 2. (Interval/ratio level), a measure of dispersion of the data around the mean, mathematically the variance is the average squared deviation from the mean. For example the variance for the age of an adult sample could be 625.
 


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