Sentences with phrase «sample test period»

Their test methodology employs monthly inception - to - date regressions of annual change in LEI4 versus next - month bond return for an out - of - sample test period of 1990 through 2011.

Science sampling test period.

Not exact matches

To test robustness of influencers, they consider: (1) subsamples to test consistency over time; (2) daily and monthly measurements to test consistency across sampling frequencies (except consumer price indexes, available only monthly); and, (3) contemporaneous and one period - lagged (predictive) relationships.

They then apply a regime - switching test to estimate whether deviations of actual gold price from fundamental value enter bubble territory over their sample period.

To test the robustness of the strategy's performance, we consider a sample period commencing with inception of SPDR S&P 500 (SPY) as a convenient and low - cost proxy for the S&P 500 Index.

It just means that there is too much randomness in the small sample size and that the system should be tested over more games (a longer time period or larger sample size).

Over the period from 8 to 18 years, sample members were assessed on a range of measures of cognitive and academic outcomes including measures of child intelligence quotient; teacher ratings of school performance; standardized tests of reading comprehension, mathematics, and scholastic ability; pass rates in school leaving examinations; and leaving school without qualifications.

By methodically sampling the area inside and outside this halo — a laborious task of mapping, examining pottery, and digging small test pits — the researchers concluded that Brak covered 320 acres in the period between 3900 and 3400 B.C..

The study is the first large - scale, U.S. - wide comparison of organic and conventional milk, testing nearly 400 samples of organic and conventional milk over an 18 - month period.

To test the idea, they drove along every street in the District of Columbia and regularly sampled the air, mapping the concentration of methane over a period of 2 months.

He and Ruane found and tested an approach that includes taking a small piece of liver tissue from the snake specimen, heating it up over a longer period of time and applying an enzyme that digests the tissue sample and enables the DNA to be extracted.

We tested whether the population had remained constant over the four primary sampling periods using robust design as well as Pradel's models [26].

Populations closure test for all the four years were consistent with the assumption that the snow leopard population was closed during the primary sampling periods (Table 1).

You can also see your hormonal status via saliva hormone test (examines saliva samples over a 24 - hour period).

Diagnosing SIBO involves a hydrogen breath test, which has the patient ingesting sugar solutions and giving breath samples over a period of several hours.

Differences in testing methods include the use of different types of blood samples (capillary or venous), different experimental time periods, and different portions of foods (50 g of total rather than of available carbohydrate).

It's possible to develop a pretty good picture of how schools and districts are doing using samples of students and samples of test items — that's what the National Assessment of Educational Progress has been relying on for decades — and there's nothing magical about a school year that makes it the inevitable time period over which to assess changes in school and district performance.

A sample of approximately 2,700 participants will be recruited over a 2 - year period to participate in two 1 - year pilot tests.

We use the 1 percent sample of Social Security administrative data that covers the period from 4 years before to 4 years following the removal of the test.

Air samples are collected hourly during the testing period, then averaged to determine the final radon level result.

Researchers tested saliva samples from ten cats and ten dogs before and after playing with their owners for a ten minute period.

When a sample of highly urbanized stations was tested, the adjustments successfully removed warming bias for the 1895 - 1980 period, but left the 1980s - 2000s period effectively unadjusted.

Which is nothing at all like the statement «It's a valid proxy because we understand the factors involved through causality tests, I can provide a calibration and a calibration bias / error, and it tests well in an out - of - sample period.»

Paleo - climate simulations with the same models that are being used for the future projections allow for the possibility that we can have true «out - of - sample» testing of the models over periods with significant climate changes.

By contrast, a second study provides each subject with a wide range of facial images designed specifically to evaluate different dimensions of facial recognition (skin colour, hair colour, ethnicity, facial shape, etc.), each subject is tested over the full range of recall time periods, and a blood sample is taken from which serum concentrations of several well - described stress hormones are measured.

Twenty minute observation, electronic interference, digital download issues, mouthpiece replacement and failure to take breath samples within a reasonable time period of operation are other examples of common areas of defense when it comes to breath test readings.

Conversely, the police want the test done promptly as there is a legal requirement that the breath sample be obtained within a reasonable period of time after operation and / or arrest.

We obviously don't have an end date for the testing period yet, as it'll depend on how fast «inevitable errors» can be fixed, but if you want to join the program later on and sample a decently stable Oreo build, «additional rounds of registration» are promised.

The study questionnaire was developed using previously tested questions and was pretested on a small sample of women from the study sites to assess clarity of the questions and time required to administer the questionnaire.4, 15 The primary outcome measure was pregnancy, determined by positive urine pregnancy test at follow - up, self - report over the study period, or positive test on medical chart review.

Paired samples t test between baseline and follow up assessment yielded no statistically significant differences at two times period (Table 6).

Thus, the current study capitalizes on multiple informants as well as a 3 - wave longitudinal design to test associations between early pubertal timing, peer reputation, and psychological distress among an ethnically diverse sample of girls transitioning through the emotionally «risky» period of early adolescence.

The focus on Germany is also dictated by the fact that it is the only country with rich, nationally representative panel data available to test our hypotheses about the parental well - being and fertility behavior over a long period and for a sufficiently large sample.

I've taken courses in cost analysis and in time management where the near craziness in one project was literally tracking a sample day in fifteen minute segments of an hour, for a 24 - hour period to test the validity of time wasting.