The phrase "a marked level" is correct and usable in written English.
It can be used to describe a specific degree or extent of something that is clearly noticeable or significant.
Example: "The study revealed a marked level of improvement in the students' test scores after the new teaching methods were implemented."
Alternatives: "a significant level" or "a noticeable level".
Even though we are only a few weeks into school, the creation of this position has produced a marked level in the increase of instructional time in the classes that have students in crisis.
There was not only a marked level of inconsistency in the selection, but also a comparable level of inconsistency in the reasons for their selections [9].
The VCAM-1 expression on activated mAEC revealed at 4 h after stimulation by TNF-α, increased with longer incubation period and sustained a marked level of expression at 48 h.
The survey also showed a marked level of support for the Los Angeles Police Department.
However, necrosis appears at a marked level by 4 h and peaked by 6 h.
Furthermore, a signficant number of respondents demonstrated a marked level of inconsistency in heart reflex point placement on the foot template.
As might be expected, this solvent has a marked levelling effect upon acids; thus, for example, acetic, benzoic, nitric, and hydrochloric acids all give solutions with identical acidic properties, owing to the ion NH4+, although, of course, in water they behave very differently.
Interviewers were instructed to continue vacuuming until the level of fine dust in the Teflon catch bottle reached a pre-marked level of 10 mL.
We found a co-existence of substantial levels of undernutrition, particularly stunting at an early age, with marked levels of overweight/obesity and an elevated risk for metabolic disease in adolescent girls.
A marked HPSE activity level could be observed in RH30, RH18 and RH28 as well as in RD and SMS-CTR cells.
Commenting on her findings, Susan Reid, research director at ScotCen Social Research, said: "Today's findings show a marked decline in levels of prejudice towards lesbian and gay people in Scotland since we last asked in 2010.
