Sentences with phrase «statistically insignificant effects»

One might quibble over where the line should be drawn in deciding if a finding is significant or not, but to combine statistically insignificant effects with statistically significant ones is to abandon any semblance of science in policy work.

For all students and for subgroups broken down by race and gender, the first - wave reforms had statistically insignificant effects on the probability of entering college.

Results of examining the differential effects of peers from troubled families by race and gender show relatively large negative and statistically significant test - score effects on white boys and statistically insignificant effects on black boys, black girls, and white girls.

Expanding school choice has been shown to improve achievement for minority students by about one - third of a standard deviation after a few years of intervention, according to seven of eight random - assignment evaluations (the eighth showed positive but statistically insignificant effects).

The turnover of high - performing teachers is a challenging problem but, in DCPS, we find that the exit of high performers generally has small and statistically insignificant effects on student achievement.»

EBay's inflammatory research paper with its uninflammatory title («Consumer Heterogeneity and Paid Search Effectiveness: A Large Scale Field Experiment»), put it this way: «The non-brand keyword experiments show that SEM had a very small and statistically insignificant effect on sales.»

However, assuming that NCLB began in the 2003 — 04 school year yields smaller effects (a statistically significant 0.09 standard deviations in 4th - grade math and a smaller and statistically insignificant effect in 8th - grade math).

The researchers found that troubled peers have a large and statistically significant negative effect on the math and reading achievement of higher income children, but only a small and statistically insignificant effect on the achievement of low - income children.

Not exact matches

Several studies going back even to 1872 has shown that the effects of intercessory prayer are statistically insignificant so as be classified as nothing more than chance.

For example, in one study of SIDS cases, the risk of sharing a bed became statistically insignificant after researchers controlled for the effects of recent maternal alcohol consumption, infant duvet use, overcrowding, and parental tiredness (Blair 2006).

In any case, changing one arbitrary standard to another would do nothing about the widespread misinterpretation and misuse of P values, or change the fact that a statistically significant P value can be calculated for an effect that is insignificant in practical terms.

A 2012 review showed that green tea's boost is even more of a bust: Its use resulted in «statistically insignificant» weight loss and no significant effect on weight management.

The effect for children from nonpoor families is once again small and statistically insignificant.

The estimated effects in the other two subjects pointed in the same direction but were statistically insignificant when examined separately.

This average combines the negative, but statistically insignificant, effects of exits of high - performing teachers with the very large improvements in student achievement resulting from the departures of low - performing teachers.

In reading, by contrast, assignment to a Level II or Level III teacher was associated with a large and statistically significant increase in reading achievement, while estimates of the effects of having a teacher from both of the other two groups remained positive but statistically insignificant.

These studies consistently suggest that compared to not participating in FWS, FWS employment may reduce first year grade point averages (GPAs), though the effect was small in three of the four studies and statistically insignificant in two of the four.

In this study, students in countries where schools have more decision - making powers in managing personnel, planning, choosing their instructional methods, and deciding how to use resources scored significantly higher in science and higher in math (though the effect in math is statistically insignificant).

Students in countries where a larger share of decisions was made at the national level scored lower in both math and science (the effect in math, however, was statistically insignificant).

Students in schools that had primary responsibility for setting the school budget scored 6 points worse in math and 3 in science (the science effect, however, is statistically insignificant).

Likewise, students of teachers who reported that they had a lot of influence on the subject matter to be taught performed worse in science, while the effect in math was statistically insignificant.

The negative test - score effect is large and statistically significant for white boys, but statistically insignificant for black boys.

Because individual cells are statistically insignificant, creating larger groups can help solidify the aggregate effects.

Further, «Although it is statistically impossible to prove the null hypothesis [i.e., no effect], if an effect existed within this sampling of dogs, it was small and clinically insignificant.»

We should beware of thinking that an effect which is «insignificant» statistically is necessarily «insignificant» ethically (this is an equivocation, a logical fallacy due to the use of words with different meaning).

The effect is statistically ionsignificant compared to the variability of CO2 activity, let alone the totality thereof; and CO2 in turn is statistically insignificant compared to the variability of any and all other factors, let alone the totality of any of them.

If present, it simply mens that, statistically, there is a non-zero effect, even though that effect maybe, well, small (and insignificant).

In the case of the peer - reviewed papers showing that the surface temperature data is contaminated, the IPCC dealt with that by simply fabricating non-existent counter-evidence in the form of a claim that the effects can be attributed to atmospheric circulation patterns, and on doing so the contamination pattern becomes statistically insignificant.

These two sites https://moyhu.blogspot.com.au/p/temperature-trend-viewer.html and http://www.ysbl.york.ac.uk/~cowtan/applets/trend/trend.html also importantly include the effect of serial correlation of the data that cause the confidence levels to widen and the pauses become even more statistically insignificant than for the simple Excel calculations.

This suggests that wind turbines have no effect on health at all, not even a psychosomatic effect (except perhaps in numbers of people so small as to be statistically insignificant).

Estimation of effect size under nonrandom sampling: the effects of censoring studies yielding statistically insignificant mean differences