The phrase "a true fraction" is correct and usable in written English.
It can be used when discussing mathematical concepts, specifically to refer to a fraction that is not an improper fraction or a whole number.
Example: "In mathematics, a true fraction is defined as a fraction where the numerator is less than the denominator, such as 1/2."
Alternatives: "proper fraction" or "genuine fraction".
In experiments with HIV where the dynamics of coinfection was studied using reporter viruses with different colors [ 14], it was observed that cells infected with viruses of two different colors can show a prevalence of >40% during virus growth, which is an underestimation of the true fraction of coinfected cells and which is difficult to account for with a large value of ϵ.
The cutoff value was derived by the point with shortest distance to the point with a true positive fraction of 100% and a false positive fraction of 0% on the ROC curve.
Most independent analysts think the true fraction is a third or more.
A true myelin fraction can be isolated from the myelinating cultures, whereas only a myelin-like fraction can be isolated from dissociated oligodendrocyte cultures, as there are no axons in these cultures about which myelin sheaths can form.
Furthermore, the lack of a true negative fraction did not allow the specificity to be determined.
On the SRC data set, the BEDROC optimized query achieved a better enrichment until a true decoy fraction of 5%.
Because a small fraction, approximately 6%, represents damaged and nonaminoacylable tRNA, the true fraction of native tRNA represented in the burst amplitude is 0.88 ± 0.01 after normalization.
The bias is positive when the true fraction of heterogeneity is small, but the bias is typically negative when the true fraction of heterogeneity is large.
Our goal was to investigate the effects of changes that the prevalence of cancer in a population have on the probability of malignancy (PM) output and an optimal combination of a true-positive fraction (TPF) and a false-positive fraction (FPF) of a mammographic and sonographic automatic classifier for the diagnosis of breast cancer.
At this value, the true-positive fraction is 72.7%, with a true-negative fraction of 53.3%.
