Примеры использования Statistical power на Английском языке и их переводы на Русский язык
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The necessity of increasing the statistical power of the analyzed samples has been noted.
Consequently, anything that enhances the accuracy andconsistency of measurement can increase statistical power.
Statistical power for correctly determining that no effect has occurred increases as confidence intervals are reduced.
The development of such a relationship would require all relevant parameters to be monitored with high statistical power.
Third, the main limitation of this study is statistical power, and the inclusion of the largest possible set of controls maximizes the power. .
In this case,the number of sampling locations may need to be increased to ensure the results have high statistical power in testing hypotheses being posed.
In several situations, they have greater statistical power than cohort studies, which must often wait for a'sufficient' number of disease events to accrue.
The sample size chosen is likely to be based on various factors including costs, statistical power, staff, study facilities, and other factors.
The numerous studies of residential radon exposure have so far contributed little to radon risk estimation,mainly because of their low statistical power.
But the researchers emphasised that their research didn't have the statistical power to show whether PrEP was effective.
In a pilot study with limited statistical power a possible association between exposure to organochlorines and the risk of childhood aplastic anaemia was shown.
Of particular interest is how to simultaneously control the overall error rate,preserve statistical power, and incorporate the dependence between tests into the adjustment.
Evaluation of the statistical power of influence gene polymorphism on production traits will determine its information as a marker to predict the efficacy of usage in breeding.
The subdivision of the sample into so many different groups meant that there was less statistical power that could be used to clearly decide which group had better outcomes.
It can be significantly more accurate than non-robust simple linear regression(least squares) for skewed and heteroskedastic data, andcompetes well against least squares even for normally distributed data in terms of statistical power.
Figure 3*: Illustration of the effects of statistical power on detecting a significant change in a predator parameter given a level of catch and the error in estimating the predator parameter.
In particular, when it comes to specific victim groups- such as women orethnic minorities- it is possible that both sample designs do not have the necessary statistical power to produce significant results for these groups.
The Committee's analysis includes an assessment of statistical power, the potential for systematic error and other sources of uncertainty, including those associated with the radiation doses received.
If the population density varies greatly within a region, stratified sampling will ensure that estimates can be made with equal accuracy in different parts of the region, andthat comparisons of sub-regions can be made with equal statistical power.
It is important to consider that it may not necessarily allow sufficient statistical power for subgroup analysis as well, particularly if seroprevalence is close to 50%, when the required sample size is the largest.
This is because of the uncertainties associated with the assessment of risks at low doses,the current absence of radiation-specific biomarkers for health effects and the insufficient statistical power of epidemiological studies.
The last major review was in 2003(see SC-CAMLR-XXII) andincluded examination of the statistical power of the monitoring to detect any change, to detect change caused by fishing, and to estimate the response of indicators to local changes in krill abundance.
The Working Group agreed that to determine whether or not the performances of predators had significantly departed from their usual state due to the impacts of concentrated fishing in an area, a monitoring program would be required in the area of fishing anddesigned to have high statistical power see Figure 3.
However, it was felt that the efficiency and statistical power gain from this double use of the controls was more important than the maintenance of statistical independence between the two sets of results.
Anticipating that there may be future similar concentration events in the Bransfield Strait, the Working Group recommended that the CEMP data relevant to the overlap of predator foraging andthe Bransfield Strait fisheries be examined to determine the statistical power of available data and what field programs might be needed to detect the effects of fishing in the region in the future.
The concept of statistical power, that is the probability that an epidemiological study will detect a given level of elevated risk with a specific degree of confidence, and various factors that affect it were summarized in the Scientific Committee's 2000 report.
Also, for low dose studies with numbers of effects that are expectedto be small and which do not have any statistical power, the value of the relative risk found for any supposedly"statistically significant" results is likely to be a substantial overestimate of the"true" risk.
Noting that ad hoc TASO requested that all working groups consider required statistical power and importance of coverage levels(SC-CAMLR-XXVII/BG/6, paragraph 3.27), the Working Group recalled that it had considered statistical power previously(e.g. WG-FSA-05/50) which led to the guidance contained within SC-CAMLRXXVI, Annex 6, Tables 19 and 20.
Further elaboration of this issue in annex A of the 2006 report, entitled"Epidemiological studies of radiation and cancer",shows that the statistical power of a study is greatly affected by the sample size, the dose level(s) of the exposed group and the magnitude of the risk coefficient, such that most low dose studies reported in the literature have inadequate statistical power.
In order to do this, the national statistical organization requires the power to negotiate and secure information from government organizations and non-government organizations.