Sentences with phrase «half of a standard deviation»

Volatility profiles based on trailing - three - year calculations of the standard deviation of service investment returns as of February 28, 2017.

The Monte Carlo simulation presents results in the form of standard deviations on a bell curve.

We recently experienced another dislocation in the market where stocks and ETFs were showing prices that were, and I'm guessing here, a ridiculous amount of standard deviations away from what would be considered normal.

VRP here differs from that in the referenced research in three ways: (1) it is a volatility premium rather than a variance premium based on standard deviation rather than the square of standard deviation; (2) it is implied volatility minus expected realized volatility, rather than the reverse, and so should be mostly positive; and, (3) estimation of expected realized volatility is much simpler.

Calculate the average of the standard deviations of daily returns over the last 60 trading days for the individual risky assets (all except Cash).

These upper and lower bands are set above and below the moving average by a certain number of standard deviations of price, thus incorporating volatility.

It's a couple of standard deviations away from the norm.

Similarly, if replacing the lowest - ranked school in the survey with a top - quintile school, student test scores would improve by 0.39 of a standard deviation using a conventional VAM, and 0.53 of a standard deviation when using the MIT team's own VAM method.

Looking at the global temperature in the form of standard deviations is very revealing.

For December - February, the cold winters in the USA and Europe in 2010 and 2011 are very evident in figure 6a (°C anomalies), however once again looking at them in the form of standard deviations gives a better indication of the overall picture.

Z - scores standardize the data to represent the number of standard deviations above or below the long - term average.

For each window, we calculated the Z - score or the number of standard deviations departing from the median FST over all windows, the proportion of fixed differences versus shared polymorphisms, and also the absolute number of fixed differences.

Rural students, who live in towns with fewer than 10,000 people, experience an increase in critical - thinking skills of nearly one - third of a standard deviation.

To catch up to the leading countries would require gains of at least half of a standard deviation, or roughly two years of learning (see «Are U.S. Students Ready to Compete?»

Students who went on a tour of Crystal Bridges experience a 6 percent of a standard deviation increase in historical empathy.

He compared this figure with Jeremy Finn and Charles Achilles's finding that attending a smaller class in the Tennessee STAR experiment raised reading scores for black 2nd graders by one - third of a standard deviation.

Overall, we find that students assigned by lottery to a tour of the museum improve their ability to think critically about art by 9 percent of a standard deviation relative to the control group.

For students at high - poverty schools, the benefit is 9 percent of a standard deviation.

We do, however, see for each additional field trip an increase in the desire among minority students to attend cultural events of 7 percent of a standard deviation.

Across all four districts, which together serve more than 465,000 students, the researchers found new elementary teachers were assigned students who had performed.1 to.3 of a standard deviation below their peers who were assigned to teachers with four years of experience or more — meaning that these students were about three to nine months of schooling behind their classmates.

And minority students gain 10 percent of a standard deviation in their desire to be art consumers.

Among rural students, the increase is much larger: 22 percent of a standard deviation.

Overall, receiving a school tour of an art museum increases student tolerance by 7 percent of a standard deviation.

For each field trip students reported, there is an increase in cultural participation of 10 percent of a standard deviation.

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.

Rural students who visited Crystal Bridges experience a 13 percent of a standard deviation improvement in tolerance.

But unlike Chingos and West, they found t teachers who chose the hybrid plan out - performed teachers who chose the defined benefit only by about 2 to 3 percent of a standard deviation, an effect that would be similar in magnitude to the difference between a beginning teacher and a teacher with one to two years of experience.

Using WAC records, we again only find a significant benefit for minority students, an increase in cultural participation of 8 percent of a standard deviation.

In math, student achievement improves by 0.21 of a standard deviation, with teacher quality improving by 1.3 standard deviations.

This sharp increase in teacher performance is about 0.27 of a standard deviation (see Figure 3) and suggests that previously low - performing teachers who opted to remain on the job undertook successful efforts to improve.

Our results show that each year of attendance at an oversubscribed Boston charter school increases the math test scores of students in our sample by 13 percent of a standard deviation.

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.

In reading, student achievement is estimated to increase by 0.14 of a standard deviation.

In reading, student achievement improves by 0.14 of a standard deviation, with an improvement of 1.0 standard deviations in teacher quality.

The overall results — the average for the three subject areas — indicate an average positive impact on student achievement of 4 percent of a standard deviation whenever the teacher - student gender was the same (see Figure 3).

Their scores drop by 5 percent of a standard deviation if they have a female teacher.

My best estimate is that it lowers test scores for both boys and girls by approximately 4 percent of a standard deviation and has even larger effects on various measures of student engagement.

Student performance in the classes of its graduates trailed by 6 percent of a standard deviation those of the graduates of the University of Central Florida.

«Cost benefit estimates,» say the authors, «show that taxpayers paid 51 dollars per student for an experienced teacher to retire in return for an increase in test scores of 1 percent of a standard deviation — a negligible amount.»

Hanushek writes that the NRC's average estimated impact of test - based accountability at 0.08 of standard deviations of student achievement «may well be too low.»

Taken together, the cost and benefit estimates suggest that taxpayers paid $ 51 per student in return for an increase in test scores of 1 percent of a standard deviation.

• Each year of attendance at an oversubscribed charter school increased the math test scores of students in the sample by 13 percent of a standard deviation, a roughly 50 percent increase over the progress typical students make in a school year, but had no impact on their fluid cognitive skills.

Even leaving this concern aside and accepting the 0.08 of standard deviation achievement boost, Hanushek finds that «we are hard pressed to come up with any other education program working at (national scale) that has produced such results.»

At worst, the taxpayers of Illinois paid $ 51 per student and saw test scores decrease by 0.002 of a standard deviation, a negligible amount.

Relative to the median, a teacher at the 84th percentile increases math and English scores by 12 and 8 percent of a standard deviation, respectively — equivalent to approximately 3 months of additional instruction.

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.

The impact on student math and reading achievement differed by about 20 percent of a standard deviation, a difference which the authors note is «striking, roughly equivalent to having a teacher who is at the 16th percentile of effectiveness rather than at the 50th percentile.»

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.

In math the graduates of the University of Florida, the state's premier university, outperformed the other institutions at teaching students in fourth to eighth grade by as much as 10 percent of a standard deviation, even though NCTQ gave it no better rating than Florida State or Florida Atlantic.

Their advantage in math and reading test scores in 5th grade is roughly 0.7 of a standard deviation, which amounts to well over two years of academic progress (see Figure 1).