The phrase "are usually selected" is correct and usable in written English.
It can be used when discussing a common practice or trend regarding the selection of items, individuals, or options in various contexts.
Example: "In competitive sports, athletes who demonstrate exceptional skills are usually selected for the national team."
Alternatives: "are typically chosen" or "are commonly picked".
It is worth noting that, when an -regularized model is fitted to high-dimensional small sample data, sparse models are usually selected (based on some model selection criteria).
In populations undergoing artificial selection, parents of the phenotyped animals are usually selected, and unbiased genetic analysis requires that the selection history is properly included in the data, i.e., the analysis should involve data on multiple generations, which is not always available.
Doorman uniforms are usually selected by the board or a subcommittee of the board.
Finalists are usually selected from each city, but there is no quota and the number chosen at each site can vary.
In interviews by psychologists — who are usually selected because they are Catholic therapists with religious views matching those of the local church leadership — candidates are also likely to be asked about their strategies for managing sexual desire.
As Nichols puts it, to be proclaimed one of each year's handful of winners — four or five are usually selected, depending on the opinions of the judges at the end of the finals concert — doesn't establish a career so much as allow a singer a toehold on the bottom rung of a new ladder to be climbed.
The crops are usually selected by its economic importance.
DHS samples are usually selected using two-stage stratified design.
PFCs are usually selected for processes with fast kinetics and short residence times.
Similar sets of polygons are usually selected as close polygons for close voxels.
The element functions θ i ( x ) ( i = 1, …, p ) are usually selected as sigmoid functions.
