When telling music students how to adjust their clarinet (as a director), it's often useful to use money terms.
In case cohort designs, it is often useful to select subcohort members using an exposure-based stratified random sampling in order to gain statistical efficiency [ 29].
Luster is the way a mineral reflects light, and while it's not a scientific test, it's often useful to include in descriptions.
In practice, it is often useful to compute weighted LD curves using both the one-reference and two-reference techniques, as both can be used for inferences in different situations.
When using a pipeline with multiple tools, it is often useful to be able to check the data produced by each tool to ensure that it is reasonable.
The Gaussian filter is not very effective in sharpening a blurry transmission map due to its low-pass characteristic, but it is often useful in removing color textures remaining in the transmission map [19].
In defining a term, it is often useful to think about its opposite.
It is often useful to study the epidemiology of a disease where it is rare, as well as where it is common.
In the case of a sensor consisting of multiple mechanical oscillators, it is often useful to create a system that can be measured using a single input and single output, by separating the oscillators in frequency.
For these reasons it is often useful to extract the "backbone" of a network or to "sparsify" it by judiciously removing edges with the goal of elucidating underlying structure.
Where patients had specific fears about being harmed by further bombings on the underground it was often useful to calculate the mathematical probability of this happening and to compare it to the patient's estimated probability.
