Students at high - poverty schools score 11 percent
of a standard deviation higher on the cultural consumer scale if they were randomly assigned to tour the museum.
However, the graduates of «endangered» St. Petersburg lifted average student math performance by 1.6 to 1.8 percent
of a standard deviation higher during the course of a year than did the graduates of top - ranked Florida State.
In other words, a student in a classroom that prohibits computers is on equal footing with a peer who is in a class that allows computers and whose GPA is one third
of a standard deviation higher — nearly the difference between a B + and A - average.
Ludger Woessman (see «Merit Pay International,» research) looked at 27 Organisation for Economic Cooperation and Development (OECD) countries and found that students in countries with some form of performance pay for teachers score about 25 percent
of a standard deviation higher on the international math test than do their peers in countries without teacher performance pay.
The average achievement of the peers in G&T students» classrooms were between 0.25 and 0.33
of a standard deviation higher in each core academic subject.
To put this in perspective, an all - female class would score about one - fifth
of a standard deviation higher in reading, all else being equal.
Specifically, students in countries that permit teacher salaries to be adjusted for outstanding performance score approximately one - quarter
of a standard deviation higher on the international math and reading tests, and about 15 percent higher on the science test, than students in countries without performance pay.
Students in countries that permit teacher salaries to be adjusted for outstanding performance score approximately one - quarter
of a standard deviation higher on the international math and reading tests, and about 15 percent higher on the science test, than students in countries without performance pay.
On average, students in countries with performance - related pay score 24.8 percent
of a standard deviation higher on the PISA math test; in reading the effect is 24.3 percent of a standard deviation; and in science it is 15.4 percent (see Figure 1).
Classrooms of students assigned to TFA teachers actually scored 2 percent
of a standard deviation higher than students assigned to traditionally certified teachers.
Given the same initial effectiveness as a traditionally certified teacher, an uncertified third - year teacher's students would score 3 percent
of a standard deviation higher, on average, in math.
Given the same initial effectiveness as a traditionally certified teacher, our results indicate that, after two years on the job, a teaching fellow's students would score 3 percent
of a standard deviation higher on average in math and reading.
Also, it was 56 percent
of a standard deviation higher than would have been the case had the schools been under nonprofit management.
In 2004, for example, average learning gains in math were only 7 percent
of a standard deviation higher in A schools than in those given a B (see Figure 2).
Overall, the research found that the academic abilities of those entering teaching declined in 1986 to 1999, but turned around rapidly after that: Teachers hired in 2010 have SAT scores 27 percent
of a standard deviation higher than they did in 1999.
Not exact matches
Timmer: You know, the last two years until the January
high, were really extraordinary times for the market, and I fear that investors got spoiled by that, because the S&P was up I think 52 % in two years and in 2017 the volatility — the
standard deviation of those returns — was at an all - time low
of 3.9.
A
higher standard deviation indicates a wider dispersion
of past returns and thus greater historical volatility.
These conditions comprise the following: S&P 500 overvalued with the Shiller P / E (the ratio
of the S&P 500 to the 10 - year average
of inflation - adjusted earnings) greater than 18; overbought with the S&P 500 within 3 %
of its upper Bollinger band (2
standard deviations above the 20 - period average) at daily, weekly, and monthly resolutions, more than 7 % above its 52 - week smoothing, and more than 50 % above its 4 - year low; overbullish with the 2 - week average
of advisory bullishness (Investors Intelligence) greater than 52 % and bearishness below 28 %; and yields rising with the 10 - year Treasury bond yield
higher than 6 - months earlier.
After the third longest bull market advance on record, fresh deterioration in key trend - following components within our measures
of market internals (see Support Drops Away) recently joined this extended, overvalued, overbought, overbullish peak, even as the S&P 500 hovers at the top
of its monthly Bollinger bands (two
standard deviations above the 20 - period average) and cyclical momentum rolls over from a 9 - year
high.
Over the entire sample period, the average daily / weekly / monthly returns
of the world stock index are
higher than those
of gold, and gold returns have
higher standard deviations than stock returns.
RZV's
standard deviation of 19.62 percent is significantly
higher than the 13.93 percent found in the Russell 2000 Index.
«OSU takes seriously the
high standards of conduct expected in our athletic department and does not tolerate any
deviation from those
standards.»
Fourth, 262 MPs receive the London accommodation budget, which has a
standard rate
of # 20,600 but can climb as
high as # 32,725 for MPs with five dependants (average
of # 22,000 and
standard deviation of # 2,500).
An extremely
high outlier was defined as having a personal average
of greater than two
standard deviations, or 2.41 cuts per case, above all physicians in the study.
This result has a significance
of 4.4
standard deviations, allowing the ATLAS collaboration to report the first direct evidence
of this phenomenon at
high energy.
«Then, if the flash rate suddenly jumps to at least twice the
standard deviation of that running average, there is a
high probability the updraft in that cell has strengthened, a supercell is forming and severe weather is more likely with that storm.»
What researchers called «a 1
standard deviation increase» in cumulative depression during early adolescence was associated with a 50 percent
higher likelihood
of cannabis - use disorder.
Regions
of differentiated were defined both based on the proportion
of fixed differences to shared polymorphisms and on a Z - score
higher than three (three
standard deviations departing from the median FST over all windows)-RRB-.
For students at
high - poverty schools, the benefit is 9 percent
of a
standard deviation.
Their peers» average test scores are about 0.15
standard deviations higher, and the new schools have
higher - quality teachers, measured in terms
of the fraction
of teachers with less than three years» experience, the fraction that are new to the school that year, the percentage
of teachers with an advanced degree, and the share
of teachers who attended a «highly competitive» college as defined by the Barron's rankings.
In
high - poverty schools, we estimate that the overall effect
of all teacher turnover on student achievement is 0.08
of a
standard deviation in math and 0.05
of a
standard deviation in reading.
On average across middle and
high school math, TFA teachers out - performed veteran teachers by 0.07
standard deviations, the equivalent
of 2.6 additional months
of instruction or helping a student move from the 27th to the 30th percentile on a normal distribution
of test scores.
Examining longer - term effects, however, the study's authors found that double - dosed students» scores on the math portion
of the ACT (taken in the spring
of 11th grade) were 0.15
standard deviations higher, the equivalent
of closing roughly 15 %
of the black - white achievement gap.
Students also scored nearly 0.20
standard deviations higher on the verbal portion
of the ACT, were substantially more likely to pass trigonometry and chemistry classes by 11th grade, and earned
higher grade point averages (GPAs) after 9th grade.
For example, states with an Hispanic - population
of 14 percentage points (two
standard deviations)
higher than the average were about 10 percent more likely to pass a charter law.
A teacher one
standard deviation above the mean effectiveness annually generates marginal gains
of over $ 400,000 in future student earnings, assuming a class size
of 20, and proportionately
higher gains with larger class sizes.
Had the reforms translated into achievement gains
of 0.12
standard deviations a year for the remainder
of the decade, with performance constant thereafter, scores
of graduates would be one
standard deviation higher going into the 1990s and the future.
This comports with the interpretation that average peer achievement influences everyone's test scores, since Asians score
higher than whites in math overall (the Asian - white score gap is positive and relatively large in math, 0.62
of a
standard deviation in the 4th, 5th, and 6th grades).
The average female scored 0.1 points
higher than the average male - a difference
of only 0.03
standard deviations.
The reversal in the overall trend is, however, driven wholly by an improvement in the rigor
of reading assessments, which set expectations that are
higher by 0.49
standard deviations in 4th grade and by 0.26
standard deviations in 8th grade.
The reforms seem to have moved the average student up by 0.2 to 0.4
standard deviations and boosted rates
of high school graduation and college entry.
Nevertheless, even the most conservative
of our three methodological approaches suggests substantial variation in principal effectiveness: a principal in the top 16 percent
of the quality distribution will produce annual student gains that are 0.05
standard deviations higher than an average principal for all students in their school.
Moreover, the benefits appear to be substantial: Students scored just over two points (or 2 percent
of the international
standard deviation)
higher for every one student fewer in their class.
These differences are even more pronounced in
high - poverty schools, for which the gap between the 25th and 75th percentile principal is more than one - third
of a
standard deviation.
A student with a growth mindset in spring 2015 has ELA and Math test scores in the spring
of 2016 that are approximately 0.07 and 0.04
standard deviations (SD)
higher than a similar classmate (i.e., a classmate with the same previous achievement and demographic characteristics in the same school) with a fixed mindset (approximately two
standard deviations below).
We observe that there is virtually no relationship between the relative affluence
of the overall student body
of the school and the SES test score gap in that school: schools serving primarily
high - SES students and those serving primarily low - SES students have the same average SES test score gaps (around 0.8
standard deviations) in both third and fifth grades.
Among schools where
high - SES students neither gain relative ground nor fall back relative to their statewide peers, there are some schools where low - SES students gain around 0.05
standard deviation of relative ground, and others where low - SES students lose 0.24
standard deviations of relative ground.
Among schools where
high - SES students fall back around 0.2
standard deviations relative to the state average between third and fifth grades, there are some schools where low - SES students lose only around 0.1
standard deviation of relative ground, and others where low - SES students lose nearly 0.4
standard deviations of relative ground.
Taking the average
of students» scores on math and literacy exams, we find that students in tracking schools scored 0.14
standard deviations higher than students in nontracking schools overall.
Even so, the test scores
of students in tracking schools remained 0.16
standard deviations higher than those
of students in nontracking schools overall (and 0.18
standard deviations higher with control variables).