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ARCH

Autoregressive Conditional Heteroskedasticity

A statistical measure of the average error between a best fit line and actual data that uses past data to predict future performance. General Autoaggressive Conditional Heteroskedasticity is the most common way of doing this. See also: Fractal Distribution.
References in periodicals archive ?
The part that had just realised we'd never be up on that stage alongside her, archly strumming a guitar and locking gazes.
Clarinettist Harry Michalas' archly done quotation from the Henry Mancini/Johnny Mercer number It Had Better Be Tonight in the suite's first movement produced a momentary visible frisson in bassoonist Laura Mackenzie and Barber's Summer Music sent us out into the snow in ironically relaxed mood.
Her life is turned upside down by the arrival of archly sinister Professor Marcus and his four friends, who between them make up the most unlikely group of criminals.
In this unusual collection, Vladislavic purports to relate ideas for stories left unfinished over the last twenty years, explaining their genesis and thwarted development while archly commenting on the circumstances which left them mere "pieces" or thoughts.
However, the reception offered to Lily on a holiday visit to the brother's home is less a beckoning hearth, and more a barely contained, and not always polite, firestorm; an unapologetic anti-Semitic and archly ethnocentric undercurrent prevails, though Taitz is careful to create complicated characters whose actions and attitudes may disgust, but who nonetheless retain an underlying and hopeful humanity.
He was third in the race last year, so he acts on the surface and has a sporting chance," said the in-form Elsworth, who archly added: "If I've got any followers left maybe they'll back him.
Inbetween an aggressive volley of recent singles like You Have Killed Me and First Of The Gang To Die, archly performed old favourites like Ouija Board, Ouija Board and Everyday Is Like Sunday, plus a decent smattering of Smiths classics Moz sang three new songs more than held their own.
Performing a play before an audience on stage, "each person can be Antigone, Oedipus, and kill their father," he said archly.
A second picture shows her sitting next to the black-haired man, twisting her head archly towards him.
before archly raising one Roger Moore-style eyelid and doing a series of back flips across the studio.
Who doesn t love Sandra Bullock," Martin asked rhetorically, to which Baldwin answered archly, "Well tonight, we may find out.
I was horrified when somebody archly said they knew who the principal was "supposed to be", and that was the first time I realised how much people scrabble to root a writer's work in local influence.