Sentence examples for estimate is difficult from inspiring English sources

The underreporting of sexual trafficking and the absence of uniform data management systems have produced different numbers, and for a country like Nepal finding an exact estimate is difficult.

When the underlying proportional hazards assumption is violated (i.e., the HR is not constant over time) the clinical meaning of such a ratio estimate is difficult, if not impossible, to interpret.

The effect of the dropouts on the estimate was difficult to evaluate, but an additional analysis weighted for non-response gave a similar result (data not shown).

Tiffany's refuses to say how much it pays for the pearls in its new bracelets and necklaces, and estimating is difficult.

However, methodologies for the estimation of tree root biomass are varied and their effectiveness in terms of the precision of biomass and carbon estimates is difficult to evaluate.

The validation of fire emission estimates is difficult, since the emissions from fire to fire are highly variable, and direct flux measurements from fires are extremely difficult.

Making precise estimates is difficult because of expected fluctuations in enrollment over the year.

The possible effect of migration to and from the United Kingdom on these estimates is difficult to assess.

Evaluating the quality of national prevalence estimates is difficult because those estimates are often reported only in context documents without clear description of the underlying data source(s).

One caveat to our meta-analysis is the significant heterogeneity observed between studies, although its impact on summary risk estimates is difficult to assess.

It must, however, be noted that direct comparison of prevalence estimates is difficult due to the differences in methodologies, recall times and case definitions.