Sentences with phrase «normal distribution of»

The requirements for a Multivariate Analysis of Variance (MANOVA), multivariate normal distribution of dependent variables and homogeneity of variance and of the covariance matrices, were verified using the Levene test (Levene, 1960) and were found to be unfulfilled only for the broadband aggression / delinquency scale in the CBCL.

Because the requirements for a MANOVA (multivariate normal distribution of dependent variables and homogeneity of variance and of the covariance matrices) were not fulfilled for the broadband aggression / delinquency scale in the CBCL, the results were re-evaluated using non-parametric tests (not shown).

Bootstrapping is a nonparametric approach to statistical inference that does not make a priori assumptions about a sampling distribution (e.g., does not necessitate a normal distribution of scores for a given variable), and empirically derives its sampling distribution from the study's data [61].

Regarding the normal distribution of the data based on Klomogrov - Smironov test (p > 0.05), the parametric statistics of one - way ANOVA, ANCOVA, MANCOVA, Bonfereni post hoc test and partial eta squared were used as appropriated.

In addition, the statistics of distribution shape reveal, on the whole, a normal distribution of the data (Field, 2009; Gravetter & Wallnau, 2014).

There are, however, families for whom the legislation yields results that are unfair or very unfair, and there are more of these outliers in family law disputes than one would expect from utilitarian legislation yielding a normal distribution of fair and unfair outcomes.

Most statistical tools assume normal distribution of the data with most of the data points grouped in the middle of the range, and either a random sample or complete set of data points.

A normal distribution of variability has 68 % of the anomalies falling within one standard deviation of the mean value.

The chance of exceeding +3 σ is only 0.13 % for a normal distribution of variability, with the same chance of a negative anomaly exceeding -3 σ.

With a normal distribution of anomalies the dividing points are ± 0.43 σ to achieve equal (one - third) chances for each of these three categories in the base period (1951 — 1980).

In a normal distribution of the data, 68 % of the data points fall within 1σ of the average value: 34 % higher than average, 34 % lower than average.

... would only demonstrate what happens when you drastically change the degrees of freedom, alterations in the spread and skewness of the data, and perform faulty significance tests incorrect assumptions about normal distribution of data.

Playing around with the numbers, and assuming a normal distribution of possible outcomes, this implies that their forecast mean is.54 C and their expected std deviation is.0785 C.

The thing is, in chaotic systems, particularly markets where «positive feedbacks» are the norm, you don't really have a normal distribution of adverse events.

Wt — Ws behaves like a normal distribution of (t - s).

Driving dynamics The normal distribution of the tractive power is clearly biased toward the rear axle.

Driving Dynamics The normal distribution of the tractive power is clearly biased toward the rear axle in accordance with the weight distribution of the e-tron.

In reality we have a normal distribution of abilities, where 50 % will be on one side and 50 % will be on the other.

Worse is that this sometimes signals to the greater public that these «new and improved» teacher evaluation systems are being used for more discriminatory purposes (i.e., to actually differentiate between good and bad teachers on some sort of discriminating continuum), or that, indeed, there is a normal distribution of teachers, as per their levels of effectiveness.

The reason is simple: once raw scores are converted into scale scores on a standardized exam, they, by design, reflect a normal distribution of scores, and it does not matter if the exam is «harder» or not — the distribution of scaled scores will continue to represent a bell curve, and once the previous scores and current scores are represented by a scatter plot, 85 % of the new scores are explained by the old scores.

Rather, we selected them to represent the normal distribution of schools on such variables as size, student SES, and school level, but weighted more heavily in favor of schools serving high - needs students.

With a normal distribution of performance (the classic bell curve), a standard deviation is simply a more precise measure of how spread out the distribution is.

We place that aver - age achievement in each district on a normal distribution of achievement relative to other districts in each state.

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.

Normal distribution of change in sugar intake from sweet food / beverages was verified using a histogram.

This normal distribution of sleep needs in a population is a bell - shaped curve.

In the normal distribution of a bell curve, you never get such extremes, but the pattern underlying the power curve enables a few rare events of extraordinary magnitude.

The χ2 test was used to check for normal distribution of the data.

Benoit's book decimates the notion of a normal distribution of stock price changes and all of the models that rely on it: the efficient - market hypothesis, CAPM, Value at Risk [VAR] etc..

Not exact matches

It is also theoretically more appropriate as Demos et al. [22] showed the distribution of mini flash crashes is not normal, and a Poisson distribution would falsely assume that mini flash crashes are independent events.

The mechanism of greater fat loss in time - restricted feeding group compared to the normal diet group seems to be due to the different time of meal distribution.

Under normal market conditions, the Gold and Precious Metals Fund will invest at least 80 percent of its net assets in equity securities of companies predominately involved in the mining, fabrication, processing, marketing, or distribution of metals including gold, silver, platinum group, palladium and diamonds.

Ken takes a look at the performance review process and illustrates how important it is to focus on providing people ongoing feedback instead of sorting them into a normal distribution curve.

I emphasize the term «large - scale» because a central bank engages in asset purchases in the normal course of business — that is how the central bank balance sheet grows along with the economy and enables the distribution of a growing stock of bank notes.

Again, evidence would suggest that you will then get the same result as before — a normal distribution with the average manager predicting correctly 50 % of the time.

«The modern financial system seems almost designed for systemic trouble because it continues to rely on VaR (value at risk), carrying the antiquated intellectual baggage of efficient markets and normal distributions into the world of risk management» Frank Martin

Though these overall returns have been consistent with my expectations, the distribution of returns between falling markets and rising markets differs from what I would expect under normal valuation conditions.

So far, we have a wonderfully normal looking distribution for teams being struck an average of 29 times.

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For variables with normal distribution, one way analysis of variance was used to compare mean values.

We are at a «constitutional moment» said White; an exceptional historical period when normal politics is superseded by the need for «We, the people» to address fundamental issues about the content and distribution of rights in society and the basic nature of government.

Some of our economists have been mainly concerned with the fairness of the distribution pattern in the country, while others have been concerned with the fairness of the distributive pattern by which the pattern has come about.Many bases have been advanced for judging the fairness of distributive patterns and of claims for particular changes in them.This and many other simple normal economic trends are what we must concern ourselves with this 21st century.

«Similarly, the cocoa mass spraying exercise was changed from the normal model of spraying by gangs to the distribution of sub-standard insecticides and fungicides to farmers to spray their own farms.

Using a mathematical model known as the Ising model, invented to describe phase transitions in statistical physics, such as how a substance changes from liquid to gas, the Johns Hopkins researchers calculated the probability distribution of methylation along the genome in several different human cell types, including normal and cancerous colon, lung and liver cells, as well as brain, skin, blood and embryonic stem cells.

What's more, by looking at the distribution of dark and normal matter in our universe, scientists can get a better handle on dark energy and how it battles gravity to slow the growth of galactic structures.

In this particular case, the researchers used DESI mass spectrometry imaging to look at the distribution and amounts of fatty acid substances, called lipids, within breast tissue and normal tissue from 61 samples obtained from 14 breast cancer patients that underwent mastectomy.

Additionally, researchers examined prostate cells — normal and cancerous — using immunofluorescence, allowing them to visualize the distribution of the target molecule and look specifically at centrosomal abnormalities and growth patterns.

Random processes in nature often underlie a so - called normal distribution that enables reliable estimation for the appearance of extreme statistical events.

Searching for an answer, neuroscientists Henry Paulson, Randall Pittman, and their Pennsylvania colleagues set out 2 years ago to look at the distribution of the MJD gene's protein product in normal brains and those of MJD patients.

The team calculated the black hole's distance from the core by comparing the distribution of starlight in the host galaxy with that of a normal elliptical galaxy from a computer model.