QUARTILE DEVIATION

A measure of dispersion. The deviation is described as half the distance between the first and third quartiles.

QUID PRO QUO

From the Latin: "one thing for another". It is a service or advantage given for one delivered or promised. For example,...

QUACK 1

A slang term for anyone who represents their ability or training in a health field regarding diagnosis and treatment. Also the description of...

QUALITY OF LIFE

Quality of life can be defined as to the extent certain desirable factors are attained or retained. These include such factors as well-being,...

QUARTIMAX ROTATION

As used in factor analysis, a perpendicular rotation maximizing the variance across the rows of the matrix.

QUINTILE

20% of a distribution of scores. The first quintile, for example could be the lowest fifth.

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