Sentences with phrase «standard deviation»

The phrase "standard deviation" refers to a measure that helps us understand how spread out or scattered a set of data points is. It tells us how much the individual data points differ or deviate from the average or mean value. A smaller standard deviation means the data points are closer to the average, while a larger standard deviation indicates more variability or dispersion among the data points. Full definition
We report our results in terms of standard deviations of student test scores.
I am looking for risk measures such as standard deviation for asset prices such as stock prices and index fund prices.
He found that students in countries with merit pay policies in place were performing approximately 0.25 standard deviations higher on an international math and science test than students in countries without such policies.
Some professionals define «gifted» as an intelligence test score above 130, two or more standard deviations above the norm, or the top 2.5 %.
It doesn't matter if you measure risk by standard deviation of returns, beta, or credit rating (with junk bonds).
The highest return was 23 % and lowest was 14 % with standard deviation of 3 %.
That gives us a figure measured in standard deviations from the average.
The impact of each intervention component is shown in terms of standard deviations on the horizontal axis.
But they are good for making comparisons, because lower standard deviations mean lower volatility — thus lower risk.
A one standard deviation increase in the share of students eligible for free / reduced lunch is associated with an 11 - percentage - point decrease in the opt - out rate.
The volatility of both portfolios, measured as annualized standard deviation of returns, was comparable.
All the curves have been centered to have the same mean and standard deviation over the length of record, so as to make them more comparable.
It is calculated using standard deviation and excess return to determine reward per unit of risk.
Average cell numbers and standard deviations at each time point were calculated from three independent experiments.
Figure 1 shows our estimates of the average impact of attending a charter school on test scores, expressed in standard deviation units.
If you have errors in a measurement, it is revealed by a larger standard deviation in the results.
It's a couple of standard deviations away from the norm.
In general, a higher standard deviation means greater volatility.
Today's racial gap is nearly one full standard deviation — approximately the difference between the performances of 4th and 8th graders.
Suppose I am blessed with the ability to identify stocks whose performance is one standard deviation better than a market index's average return.
This approach yields a forecast of 5.6 million square kilometers with a one standard deviation range between 4.6 and 6.4 millions square kilometers.
Again the data looks similar to before, and we're back to the situation of having standard deviation around 0.5 for highly expressed genes.
A high standard deviation indicates a wide range of returns and thus greater volatility.
The spreadsheet above uses 10 years of price data (when available) to calculate price standard deviation.
For those without special accommodations, one finds no gains in verbal scores and just a 0.1 standard deviation gain in math scores over this period of time.
While standard deviation might mean something to certain investors, it means almost nothing to others.
The shaded regions are the one - and two - standard deviation uncertainties calculated including both statistical and spatial sampling errors.
The blue line tracked the lowest standard deviation value in 120 days.
Standard deviation does not indicate how an investment actually performed, but it does indicate the volatility of its returns over time.
That anybody that says that they see five and ten standard deviation events every couple of years is obviously not thinking correctly about probabilities.
We then determined how many standard deviations each state's difference was above or below the average difference of all observations in 2009, 2007, and 2005 on each test.
If you don't know what standard deviation means, that's fine.
a b c d e f g h i j k l m n o p q r s t u v w x y z