The great leader understands the statistical concept
of regression to the mean.
The most modest interventions should've helped, not to mention the statistical phenomenon
of regression to the mean.
Then there might be some protection on the downside with some undetermined probability, however slight,
of regression to the mean in terms of earnings.
In essence, all that's happened here is the rediscovery of the principle
of regression to the mean.
We also carried out analyses to examine the effect of potential influence
of regression to the mean arising from the fact that high injury numbers might have been a factor in the decision to implement a 20 mph zone in some areas.
Not exact matches
Over a long enough time period such effects tend
to cancel out (a phenomenon called «
regression to the
mean»), thus it is unlikely that a firm is consistently high performing just because
of chance events.»
With so many cheap stocks
to choose from in 2009, even value managers who didn't want
to buy financials could easily build a portfolio full
of cheap stocks and wait for
regression to the
mean.
«It bears repeating that most investors extrapolate past performance, expecting the continuation
of trends rather than the far - more - dependable
regression to the
mean.
Jung has seen that psychologically this
means that an overemphasis on either side
of a polarity such as conscious - unconscious, or sacred - profane, will lead not
to a dialectical coincidentia oppositorum but
to a reinforcement or enantiodromia
of the (untransfigured) other pole, that is,
to an inundation or
regression.17 It will be helpful
to keep these Jungian motifs in mind as we explore the somewhat surprising parallels between Jung's notion
of «individuation» and Altizer's idea
of an ongoing kenotic incarnation.
From what has gone before, the
meaning of «its own realization» is obviously a part
of what has been characterized as «ideal» realization, which was seen
to be linked
to conceptual
regression (cf. PR 87 / 134).
This
means distinguishing between healthy and unhealthy aspects
of a person's religion; recognizing both the existential and pathological sources
of anxiety, the significance
of religious defenses,
regression, and growth; and giving whatever encouragement he feels is indicated
to positive religious directions.
When you cut through the chaos and look through the clear eyes
of objective data, Game 4 was the ultimate
regression to the
mean.
A home - heavy schedule, excellent basketball by Bradley prior
to an enormous
regression to the
mean, excellent basketball from Tobias before a similar but substantially smaller
regression, hot shooting by Tolliver, Ish (for him) and Galloway, an offense that opponents hadn't already totally figured out, and overall solid health (sans perhaps Bradley's pre-absence groin injury, which was
of unspecified severity).
But considering how poor this unit was for much
of the year, we'll assume improvement, from a progression -
to - the -
mean standpoint, is more likely than
regression.
But all
of that changed when he hit the four - month mark, and I was forced
to learn the true
meaning of the term «4 - month - old baby sleep
regression.»
We also estimated relative indices
of inequality (RII) and slope indices
of inequality (SII) as summary measures
of relative and absolute inequalities
of breastfeeding outcomes, respectively, across the entire distribution
of maternal education.24 For child IQ, linear
regression analyses using GEEs were performed
to estimate
mean IQ differences in lower maternal education from the reference category in each intervention group and compared between the groups.
Meta -
regression was also used
to establish whether
mean concentrations
of total cholesterol in each study had any effect on
mean differences between feeding groups.
If a process is
meant to improve the integrity
of the electoral process, judgments that shoot it down can not advance the cause
of our development; it
means we have chosen a path
of regression to the era where elections are decided by unsavory self - help in bloating the voter register with strange names on the part
of politicians.
Some online dating sites offering compatibility matching methods use the word similarity as: «a proprietary Dyadic Adjustment Scale», others
mean: «a proprietary multivariate linear
regression equation», some say a mix
of similarity and complementarity
meaning: «a proprietary multivariate logistic
regression equation», still others mix similarity and complementarity
meaning: «a proprietary equation
to calculate «compatibility» between prospective mates!»
To complete the task cards students will use knowledge
of linear
regressions (line
of best fit, least squares
regression), correlation coefficients, and calculating residuals and their
meaning.
Regression to the
mean can not explain the gains
of high - scoring F schools relative
to low - scoring D - schools because both groups begin with similarly low scores.
Statisticians explain the changes, regardless
of direction, by claiming «
regression to the
mean.»
Discuss the idea
of «
regression to the
mean» as it applies
to schools.
We also find that high - performing teachers» value - added dropped and low - performing teachers» value - added gained in the post-move years, primarily as a result
of regression to the within - teacher
mean and unrelated
to school setting changes.
They play the game
of relative value, by using strategies such as
regression to the
mean.
It is a book about why long - term investing serves you far better than short - term speculation; about the value
of diversification; about the powerful role
of investment costs; about the perils
of relying a fund's past performance and ignoring the principle
of reversion (or
regression)
to the
mean (RTM) in investing; and about how financial markets work.
Or perhaps a flood
of new investment capital over the last decade or so has produced a lofty ending valuation, which has yet
to mean revert, 12 and which would lead the
regression to underestimate the true power
of valuation for the low beta factor.
The whole managed futures universe has performed so abysmally that you have
to wonder if
regression to the
mean is about
to rescue some
of the surviving funds.
«
Regression to the
mean is the most powerful law in financial physics: Periods
of above - average performance are inevitably followed by below - average returns, and bad times inevitably set the stage for surprisingly good performance.»
«
Regression to the
mean» refers
to the inevitability
of prices revisiting a long - term trend.
The analysis provides insight into the rate
of regression toward the
mean and the
mean to which results regress.
Regression to the
mean is nature's way
of leveling the playing field, in almost every game, including investing.
This tendency for trends
to flip with the passage
of time is called
regression to the
mean.
The law
of averages and
regression to the
mean, sort
of dictate that on a long time line your Big Bad Active Fund will do about as well as the market did.
This phenomenon leads
to nonsense when people attribute the
regression to the
mean to some particular scientific law, rather than
to the natural behavior
of any random quantity.
Perhaps it's my age (I remember when I had do do linear
regressions with a pencil and paper for the sums, and a slide rule
to help with the squares and square roots), but a fundamental principle
of a linear least squares
regression is that the best fit line passes through the point represented by the
mean X and
mean Y values.
A linear
regression says «let's allow our
mean Y
to depend on X in a linear fashion», instead
of using a single
mean Y
to represent the data (independent
of X).
According
to the submitted paper, they «fit each record [ENSO and AMO times series] separately
to 5th order polynomials using a linear least - squares
regression; we subtracted the respective fits... This procedure effectively removes slow changes such as global warming and the ~ 70 year cycle
of the AMO, and gives each record zero
mean.»
I have linearly extended the ensemble
mean model values for the post 2003 period (using a
regression from 1993 - 2002)
to get a rough sense
of where those runs might have gone.
As it is, a forcast for 2005 based on OLS
regression for 1988
to 2006 has a
mean of 0.61 C with a 95 % CI from 0.37 C
to 0.84 C.
Whether linear or curvilinear correlations, and regardless
of the
regression method, or outlier elimination process for values in a data set + / - 3 s.d.'s from the
mean, error analysis and going back
to raw data are essential procedures.
Their approach requires an estimate
of the forced global
mean temperature in a given year (excluding any natural variability), which are derived from Otto et al (2015), who employ a
regression approach
to reconstruct a prediction
of global
mean temperatures as a function
of anthropogenic and natural forcing agents.
To be explicit, when I said «linear model» I
meant the assumption
of validity
of linear
regression between temperature and independent variables.
Anyway, the change from the usual certainty level also
means — I'm estimating here — that the coefficient
of the
regression associated with time is estimated at 0.5 W - 2 with a 95 % chance
of being anywhere in the interval -(some - number)
to one - point - something Wm - 2.
Then this
means that the coefficient
of the
regression associated with time is estimated at 0.5 W - 2 with a 90 % chance
of being anywhere in the interval 0.07
to 0.93 Wm - 2.
All calculations (i.e. here or here) using the
regression method - observed GMST vs. the total forcings - come
to TCR estimates which are well below the
mean of the CMIP5 models
of 1.8 K / doubling CO2.
All it actually
means is the linear
regression model doesn't fit the data perfectly, but
of course not, that's
to be expected given temperature data doesn't follow a perfect line.
In our revision
of the historical runoff model, we attempted
to add several parameters
of temperature — seasonal
means, maximums, and minimums — as explanatory variables
to the revised
regression model but none were significant.
They draw a line on a graph showing the rate
of warming from that unnatural peak in 1998
to now, and make it look like warming has continued at a steady pace, and not accelerated as expected (an argument that would fail any Statistics 101 class, as it ignores «
regression to the
mean»).
Then we add / subtract this scaled interannual
regression map
to / from the anthropogenically - forced component
of the trend over the next 30 years, the latter estimated from the ensemble -
mean of the CESM - LE (Fig. 8) or the ensemble -
mean of the 38 CMIP5 models (Fig. 9).