The phrase 'ascertain assumptions' is correct and usable in written English.
You can use it when you need to determine what other people believe in order to properly analyze a certain situation. For example, "We need to ascertain the assumptions made by the other side before we can develop a response."
However, more research on larger populations is needed to ascertain such assumptions.
Open-ended questions were used and statements respondents made were probed to clarify meaning, obtain additional detail and ascertain what assumptions underlie them.
The negative result can be attributable to the relatively low number of cases; and therefore, large-scale studies may help ascertain this assumption.
In this way, "non-rational determinants of political-administration action" were to be reduced.19 The project team ascertained "fundamental assumptions and allocated information holdings" of the administrators "on social, economic and political prerequisites".
Unfortunately, given the available data in the Siberian jays, ascertaining the assumptions and quantifying the relevant parameters underlying these non-mutually exclusive hypotheses is difficult.
Graphical methods were used to ascertain underlying model assumptions as proportional hazards.
In order to ascertain whether this assumption is plausible, two tests for the equality of variances have been implemented in each case.
When we begin to address these sorts of questions, we also begin to ascertain the sorts of assumptions at play in the endoxa coming down to us regarding the nature of time.
Log minus log diagrams were used to ascertain the proportional hazard assumption.
Tests based on interaction with time were used to ascertain the proportional hazards assumption for time-constant variables (age, gender, level of education, length of time from diagnosis of dementia, cardiovascular risk factors, cardiovascular disease or other co-morbidities, CT).
