The total variance in the data gives an upper limit to the errors, and using that upper limit we can compute a statistically reliable estimate
of the significance of the trend.
I am especially interested in the mathematical details outlined in this sentence; «The total variance in the data gives an upper limit to the errors, and using that upper limit we can compute a statistically reliable estimate
of the significance of the trend.»
These results indicate that the commonly used pre-whitening procedure for eliminating the effect of serial correlation on the MK test leads to potentially inaccurate assessments
of the significance of a trend; and certain procedures will be more appropriate for eliminating the impact of serial correlation on the MK test.
-- as long as you ignore the lack
of significance of the trend.
Not exact matches
To understand the
significance of this
trend line we need to understand the way
trend lines change polarity or function.
In this situation, where the shorter - term chart
of SLV is showing more strength than GLD, but the longer - term chart is showing the opposite, the longer - term chart interval bears the most weight, and therefore holds the most
significance in ultimately determining the direction
of the
trend.
But the story is evolving (with worrying recent
trends), and the
significance of reduced infection rates is hotly debated.
Only recently have I been contemplating the
significance of this
trend, catching myself in the act
of commodifying and consuming other people and also experiencing the pain
of being commodified and consumed myself.
The independent springing up
of other writers who have sought to answer this need in a similar way is as much a testimony to the
significance of the general
trend of Buber's thought as is the rapidly increasing number
of thinkers who have been directly or indirectly influenced by him.
But this in itself could be
of little more
significance than the oriental
trends toward monotheism already mentioned.
The report identifies key
trends that will influence the packaging industry over the next five years and highlights the
significance of e-commerce specific packaging and «smart» packaging features.
There has been 1 recent study showing a
trend to
significance in measures
of maximum voluntary isometric contraction, CK, and C - reactive protein levels following marathon running (14).
These are two
trends which become fertile environment for various sorts
of crises in which its stabilizing role will be called to play for the sake
of saving Russians abroad or philo - Russian citizens in these countries, or for gaining a foothold in a situation to which the EU attaches much
significance.
These changes have brought new actors not traditionally associated with humanitarian situations onto the scene: technologists, data analysts, social innovators, private sector businesses and financial intermediaries, among others.Yet to understand the full
significance of these
trends, we must dig deeper.
In February, a similar study
of PRO 2000 that only involved about one - third as many women found 30 % fewer HIV infections in the treated group, but with a p - value
of 0.10 — a positive
trend that did not reach statistical
significance.
The researchers note one major limitation
of their new study: Assessing
trends was made tougher by the fact that roughly a third
of the trials lacked sufficient statistical data for outsiders to confirm the
significance of any symptoms
of depression.
An influential 2012 report on 120 monkeys being studied at the National Institute
of Aging (NIA) reported no differences in survival for caloric restriction animals and a
trend toward improved health that did not reach statistical
significance.
Similar
trends were observed for the effect
of TE in WT mice, but these did not reach statistical
significance [Fig. 3 (a)-RSB-.
All
trends were evaluated using Mann — Kendall
trend tests, following a four - step process to reduce the effects
of serial autocorrelation on
significance tests66 (see Supplemental Methods).
Low - fat yogurt consumption was associated with a higher incidence
of depression (HR: 1.32; 95 % CI: 1.06, 1.65; P -
trend = 0.001), although this association lost
significance after the exclusion
of early incident cases, suggesting possible reverse causation bias.
The mechanisms responsible for a greater weight loss with the B2 regimen may be the
trend toward a smaller decrease in REE with B2 that we measured (although the difference between regimens did not reach the threshold for statistical
significance), together with a greater thermogenic response
of larger meals, as documented by others [11].
When the study is reported in the popular press, some scientists downplay the
significance of the reported
trend.
Compared with bean nonconsumers, both baked bean consumers and variety bean consumers had significantly higher intakes
of total legumes, fiber, and minerals and lower intakes
of discretionary fat (
trend toward
significance in variety bean consumers).
A Canadian study showed a significant protective
trend for the intake
of cereals, with borderline
significance for Dietary Fiber (Rohan et al., 1993).
These
trends increase the
significance of herpes support centres and herpes dating sites in UK, where people can not only find the adequate support but also get to know the right approach on how to deal with the virus.
In effect, there are a lot
of factors that warrant the increasing
trend of online dating in the 21st century; its positive impacts and several success stories speak volume about its
significance.
The current
trend of the industry also lends further credence to the
significance of autonomous driving, especially for an urban car like the Giulia.
The
trend towards devaluing the
significance of early retirement savings is only growing; right now, about half
of new graduates claim to shift their attention to student loans instead
of retirement.
Through its collection, the Museum provides an overview
of significant movements and
trends in American art beginning in the 20th century and art
of significance to the Southeast.
Offering insight into the
significance of competitions in career development, the panel examines the reasons behind the prominence
of international accolades and uncovers recurring
trends in winning works.
Offering insight into the
significance of competitions in career development, the Preparing for the Future: Talent Development and Art Prizes panel at the Future Now Symposium examines the reasons behind the prominence
of international accolades and uncovers recurring
trends in winning works.
You seem to be foraging in the chaos
of localized events in the noise to dissemble the
significance of the anomaly
trend in context
of the historical
trend.
sorry Tilo, but i am slightly sceptical
of a person, who denies to look at the STATISTICAL
SIGNIFICANCE of his
trend lines.
Random errors (noise in these posts) will accentuate the variability
of the data and increase the demands on the
trend needed to establish
significance.
Our experience is that starting a
trend in a relatively low point
of a slowly fluctuating time series can sometimes lead to findings
of statistical
significance which don't hold up as the record is further extended (e.g. extended further back in time or new years added on the end).
Both increases statistical
significance and decreases the
trend, and all done by going monthly instead
of the standard yearly.
But the shortness
of the warming period did not stop Hansen explaining to Congress the statistical
significance of the rising
trend that had occured during the 12 years before 1988.
If you permit one to remove the
trend then the correlation continues to be reasonable, but if one accepts that there is some other large variation unrelated to cosmic rays, then
of course that diminishes the relative
significance / importance
of the cosmic ray correlation.
I think the main
significance of 2014 is that it continues the upward
trend.
Anything beyond histograms (e.g.
significance of trends etc.) needs to deal with this somehow and it gets complicated fast.
If there is a
trend that continues with increasingly higher typhoon landfalls over Japan, even if there is a near - constant total number
of Typhoons over the Pacific, this would have
significance on many levels.
I agree with some
of your points but, regarding null hypothesis
significance testing, we're talking about datasets which we believe, a priori, will not demonstrate
significance according to standard detection methods even in the presence
of a
trend.
PAber, I am surprised that you do not understand the purpose and
significance of linear
trends, particularly when you emphasize the noisiness
of the data.
This seems like a good, mainstream, very technical, contribution to the difficult problems
of (a) determining the statistical
significance of apparent
trends in climate - related measurements and, (b) figuring out what they mean.
Clearly the magnitude
of the correction is
of no great
significance to the overall
trend.
While the anomalous nature
of recent
trends in global average temperature is often highlighted in discussions
of climate change, changes at regional scales have potentially greater societal
significance.
It's vital to see that support for such work is sustained, given the early stages
of understanding and enormous
significance of these
trends.
Knorr would agree with Running that the time span was probably the main
significance of his study, but he sticks by his findings
of a constant airborne fraction
of CO2 and believes they are more accurate than the
trend found in the LaQuéré study.
First, Happer mentions statistical
significance, but global surface temperature
trends are rarely if ever statistically significant (at a 95 % confidence level) over periods as short as a decade, even in the presence
of an underlying long - term warming
trend, because
of the natural variability and noise in the climate system.
To counteract the undeniable fact that no significant warming has occurred since about 1997, Karlsson produces the breathtakingly self - interested assertion that ``... statistical
significance relates to how probable the observe [d] data, or more extreme data, are on the null hypothesis, not the practical
significance of the observed
trend.