"within normal parameters" is correct and usable in written English.
You can use the phrase when talking about something that is within the expected range. For example, "Her blood pressure was within normal parameters."
I mean, she's wrong about absolutely everything, but she's wrong within normal parameters".
Deferred benefit indexation, when viewed through an actuarial matrix subliminator, shows a benefit-to-deficit ratio of.003, which is entirely within normal parameters.
Or that the California Cancer Register concluded that disease rates around Hinkley, the town in which the movie is set, were within normal parameters?
The bank also said that, in terms of the size of the deposits, recent shifts had been "within normal parameters" and that it anticipated no "significant changes" in coming days.
All were within normal parameters.
Although statistically significant, these findings were not considered clinically significant because values remained within normal parameters.
It was, they felt, what many people failed to understand – that in many ways their parents functioned within the normal parameters of human behaviour.
The Cabinet Office review found they were performing "within the normal parameters of large technology contracts" and that Atos provided an appropriate level of professional support.
The Guttmacher Institute has found that while there is some (limited) evidence of son preference among Chinese-, Indiand and Korean-American families when older children are daughters, "the U.S. sex ratio at birth in 2005 stood at 105 boys to 100 girls, squarely within biologically normal parameters".
The investigation determined that Smith had acted within the normal parameters of his job.
