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discriminant

   Also found in: Dictionary/thesaurus, Wikipedia 0.06 sec.
discriminant [di′skrim·ə·nənt]
(mathematics)
The quantityb2- 4ac,wherea,b,care coefficients of a given quadratic polynomial:ax2+bx+c.
More generally, for the polynomial equationa0xn+a1xn-1+···+anx0= 0,a02n-2times the product of the squares of all the differences of the roots of the equation, taken in pairs.


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That message was reinforced in June 2006 when the Treasury Inspector General for Tax Administration pointedly reported to Congress that examinations based on whistleblower tips were almost twice as effective as examinations based simply on Discriminant Index Function scores (as measured by dollars recovered per hour of examination time).
Thus, significant gender-related differences between the four subgroups can be taken as an indication of discriminant validity.
The concurrent and discriminant validity data for the present study were obtained from the remaining 245 participants in the RCT.
 
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