I'm not sure but I think that post may have been a joke given the name and the larger than
average number of errors... not sure, but that was my guess.
Not exact matches
«Gifted, determined, ambitious professionals have come into investment management in such large
numbers during the past 30 years that it may no longer be feasible for any
of them to profit from the
errors of all the other sufficiently often and by sufficient magnitude to beat market
averages.»
# 2)
Error Coherence: When you combine a large
number of those measurements to get an
average answer, do all the
errors «pile up» or do they tend to «cancel each other out» instead?
«The more decisions you make, the more your portfolio trends towards
average and the higher
number of errors creep into your decision making,» says Hugo Lavallée, manager
of Fidelity's Canadian Opportunities Fund.
Of course the errors are even more significant when one inflated figure is multiplied by another — as when Lepczyk et al. [6] multiply the average number of prey items returned by the average number of outdoor cats per owne
Of course the
errors are even more significant when one inflated figure is multiplied by another — as when Lepczyk et al. [6] multiply the
average number of prey items returned by the average number of outdoor cats per owne
of prey items returned by the
average number of outdoor cats per owne
of outdoor cats per owner.
A similar
error is made when the authors use an
average to describe the
number of outdoor cats owned by each landowner.
There is a quantitative effect
of this
error, both on global
average calculations up to the 1970's and on the uncertainty
of that
number.
There are three parameters, the
error - bound s
of each sample, the desired
error - bound
of the
average a in each grid, and the
number n
of samples there for the year.
The mean
average of all the linear trends is slightly positive (+1.0 mm / yr, with a standard
error of 0.1 mm / yr), but there are a large
number of gauges with substantially lower or higher trends.
As you can see, we can't trust any individual data point to better than + / - 5 degs yet by taking the
average of 100 data points the
error drops by an order
of magnitude to (The
error falls as the square root
of the
number of data points) to give an accuracy
of a fraction
of a degree.
Taking decadal
averages based on round
numbers of calendar years is arbitrary and
error prone.
It can be shown that CO2 levels over the period 1982 — 2007 at all stations (up to a modern
number of 9 stations)
averaged 0.480 ± 0.065 % below the global
average (
errors at the ± one standard deviation level).
Therefore, by the law
of large
numbers, these
errors will mostly cancel out as the
number of observations gets large (in other words the
average of the
errors will be very close to zero).
As well, since different
numbers of trees contribute at different ages, both the raw
averages and the standardized
averages (by subtracting the
number one and then dividing by the standard
error) were calculated.
I found some reference to calculating
error margin based on measurement
error of 0.1 F, So the.141 is for subtracting Tmx (mn) from Tmx (mn), and.316 is for
averaging Tmn and Tmx, count it the
number of samples.
The
average numbers of male and female births (± 1 standard
error) in each month
of the year,
averaged over 1980 — 2009 (n = 30).
Knutti et al. (2010a) investigated the behaviour
of the state -
of - the - art climate model ensemble created by the World Climate Research Programme's Coupled Model Intercomparison Project Phase 3 (CMIP3, Meehl et al. 2007), and found that the truth centred paradigm is incompatible with the CMIP3 ensemble: the ensemble mean does not converge to observations as the
number of ensemble members increases, and the pairwise correlation
of model
errors (the differences between model and observation) between two ensemble members does not
average to zero (Knutti et al. 2010a; Annan and Hargreaves 2010; hereafter AH10).
Adding the relevant years» total uncertainty estimates for the HadCRUT4 21 - year smoothed decadal data (estimated 5 — 95 % ranges 0.17 °C and 0.126 °C), and very generously assuming the variance uncertainty scales inversely with the
number of years
averaged, gives an
error standard deviation for the change in decadal temperature
of 0.08 °C (all uncertainty
errors are assumed to be normally distributed, and independent except where otherwise stated).