Sentences with phrase «statistical control»

The application of statistical controls using longitudinal data systems often provide meaningful information regarding program impacts even without random assignment.

Higher engagement in spring predicted higher end of year objective achievement test scores after statistical control of prior year test scores.

When should we believe program impacts based on statistical controls in the absence of a randomized trial?

While this study did not incorporate statistical controls, it looked at time - to - degree figures across all public institutions in the 10 state southern region.

Sexual abuse, family environment, and psychological symptoms: On the validity of statistical control.

For instance, although most of the studies cited above do include statistical controls for peer effects (the mean characteristics of other student in a class or school), very few states or districts do so when generating value - added estimates.

Performing the responsibilities of Contract and Mfg Process Review, creating Inspection method Sheets and Statistical Control Charts.

Statistical controls do not necessarily eliminate selection bias, but we can validate the observational strategy by comparing observational and lottery estimates in the sample where both can be computed.

For instance, several recent papers have exploited school admission lotteries to compare estimates of the impact of attending a particular school using the lottery - based comparison groups as well as statistical controls to compare students attending different schools.

Student Growth Percentile (SGP): The SGP model is traditionally not considered a VAM mainly because it does not use as many sophisticated statistical controls.

While complex statistical methods are often used to «control» or «account» for students» levels of risk or risk factors, much debate exists about the extent to which such statistical controls, no matter how sophisticated, indeed work (e.g., to partly / wholly eliminate «bias»).

And even those apparent advantages vanished after standard statistical controls were applied.

Limitations include significant differences between the HFA and control groups at baseline (generally indicating the HV group was at higher risk, and addressed through statistical control), small sample size, and lack of information on service that may have been received by the control group families.

Such associations exist after statistical control of the original childhood levels of academic achievement [29].

Research Design: The meta - analysis corpus consisted of (1) experimental studies using random assignment and (2) quasi-experiments with statistical control for preexisting group differences.

Their methods — including an elaborate set of statistical controls for variables like student SES and prior achievement — also allowed them to make tentative causal inferences about which teaching strategies seem to be more effective for students who were stronger or weaker in math to begin with.

In an effort to gauge the external validity of our lottery estimates, we computed observational estimates that rely solely on statistical controls, with separate effects for schools in and out of the lottery sample.

Walter Shewhart, then working at Bell Telephone Laboratories first devised a statistical control chart in 1923; it is still named after him.

This means that men's wages in their post-fatherhood years are, on average, 12 % higher than in their pre-fatherhood years, net of statistical controls.

Statistical controls for income, gender, region, education, and age do not appreciably alter these patterns, although each has its own influence on the vote.

Statistical controls for children's prior problem behaviour reduce the effects of low family income on children's behavioural problems by about half.3 - 8

The most important characteristic included among our statistical controls is 8th - grade test score, which aims to capture differences in student ability and students» educational experiences prior to high school.

Amrein and Berliner used no statistical controls at all.

Because of the rigor of our statistical controls, we approximate the condition in which the children are otherwise identical except in their race or ethnicity.

Statistical controls must be used if the assessments of teachers, schools, or programs are to be accurate, even though very few educators understand the statistical principles and methods involved.

Hence, there was a reason Chetty et al. did not find bias in their value - added estimates because they did not use the proper, statistical controls to control for bias in the first place.

Promising — at least one well - designed and well - implemented correlation study with statistical controls for selection bias.

Third, value - added models use statistical controls to make allowances for students» backgrounds and abilities.

However, given the statistical controls employed and the consistency of their findings with other studies at different grade levels, one can conclude that the question as to whether effective teachers make a significant difference in student achievement has been answered.

Whether using the randomized lotteries or statistical controls for measured background characteristics, we generally find large positive effects for Charter Schools, at both the middle school and high school levels...

Johnson's study used a system of statistical controls that differed from Wenglinsky's research.

Implemented new organizational project management processes, including weekly earned value analysis (using Microsoft Project and SAP) and statistical control of defect tracking

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