Sentences with phrase «calendar age of the samples»

Because of well - known problems in calibrating dates from 3,500 years ago, he knew the lab would be unable to pin down the exact calendar age of the samples, but the uncalibrated measured age of the cattle bones closely matched the latest equivalent dates for the cataclysm on Thera.

In these frequentist coverage tests, for each integral percentage point of probability the proportion of cases where the true calendar age of the sample falls below the upper limit given by the method involved for a one - sided interval extending to that percentage point is computed.

Nic:... you assume that genuine prior information exists as to the true calendar age of a sample, whereas I do not.

I think the fundamental difference between us is that you assume that genuine prior information exists as to the true calendar age of a sample, whereas I do not.

Not exact matches

Of course, the table, so constructed, will only give the correct calibration if the tree - ring chronology which was used to construct it had placed each ring in the true calendar year in which it grew.Measurements made using specially designed, more elaborate apparatus and more astute sampling - handling techniques have yielded radiocarbon ages for anthracite greater than 70,000 radiocarbon years, the sensitivity limit of this equipmenOf course, the table, so constructed, will only give the correct calibration if the tree - ring chronology which was used to construct it had placed each ring in the true calendar year in which it grew.Measurements made using specially designed, more elaborate apparatus and more astute sampling - handling techniques have yielded radiocarbon ages for anthracite greater than 70,000 radiocarbon years, the sensitivity limit of this equipmenof this equipment.

As a result, we can select any ring on any sample and can radiocarbon date it, and compare the radiocarbon age to the calendar date of that ring.

There remains therefore finite probability that the RC Age is drawn from any true Calendar Date from 475 (say) to 750 (say) since a sample from any of these dates could give rise to the observed measurement of RC Age.

Subjective Bayesians will probably throw up their hands in horror at it, since it would be unphysical to think that the probability of a sample having any particular calendar age depended on the shape of the calibration curve.

In this hypothetical problem of a perfectly accurate lab measurement, we now want to generate the pdf of the «Calendar Date given our perfectly accurate sample - measured RC Age».

The calibration curve is derived by taking samples from objects of known reliable calendar date and calculating the RC age on those samples (using the same assumed initial mass fraction as in our sample measurement).

The prior gives virtually zero probability to large intervals of calendar age based solely on the shape of the calibration curve, with this curve being the result of physical processes that almost certainly have nothing to do with the age of the sample.