The phrase "a calculation or a" is not complete and lacks context, but it is grammatically correct as part of a larger sentence.
You can use it when discussing options or alternatives related to calculations in a mathematical or analytical context.
Example: "When faced with a problem, you can choose to perform a calculation or a simulation to find the best solution."
Alternatives: "an assessment or a" or "a computation or a".
So, the general rule for the exam will be if you're stuck in a calculation or you're missing a little piece of the puzzle, try to do as much as you can.
There is no hint of a calculation or empirical evidence showing that a de novo gene can arise fortuitously without involvement of selection.
The madness that ensues instantly on the results of an experiment or calculation, or on a comment from an advisor or colleague.
In [36], a BPA calculation or a combination of two BPAs is defined as a BPA evaluation.
Many aspects that make a model very general have been intentionally omitted in the RCM in order to reduce complexity, for example, a dedicated path loss calculation, or a description of general environments.
"I'm confused," he said, "whether the whole fact-free zone that he's in is a strategic calculation or a kind of psychosis".
We don't accept the notion that citizenship is a matter of indifference or political calculation, or a status that should be withheld from millions of people who have become an integral part of the fabric of the American economy and culture.
Table 4 (col. 2-4) shows the proportion of questionnaires for each instrument, where a calculation of a utility or total score was not possible due to missing items.
When a random effects model is fitted to clustered data, predictions may be produced for a member of an existing cluster by using estimates of the fixed effects (regression coefficients) and the random effect for the cluster (conditional risk calculation), or for a member of a new cluster (marginal risk calculation).
If yours isn't, include well-sourced statistics, a napkin-math calculation, or an argument as to why winning this niche unlocks an adjacent, bigger market.
