This system causes variance in the quality of education in the country.
As you point out, biased sampling in a group alone will cause variance.
This process can actually cause variance in fitness to increase, so long as higher even moments decrease.
In the QM6a background the cellulase activities and extracellular protein concentration in general are rather low causing variance between biological replicates.
As conditional height and relative weight variables are by definition uncorrelated, they can be included in a single multivariate model without causing variance inflation.
While this is probably true to some extent, knowledge would have been acquired in a less systematic way, causing variance to be bigger and effects to be smaller.
By design, these conditional variables are uncorrelated with each other (and were also uncorrelated with weight at age 13 weeks) and therefore can be included in a single multivariable model without causing variance inflation.
Furthermore, a possible confounder could be the difference in renal insufficiency onset (acute vs chronic) in different studies; however, there is no evidence that this can cause variance in anti-Xa activity.
Multiple factors like postseason results and supplemental rights deals can cause variances – for instance, the Big 12's distribution totals do not include third-tier broadcast rights, which member schools negotiate individually – but these numbers should come fairly close to the eventual distributions.
There are multiple versions of the Last Road to Hell segment of the film, which causes variances even among uncensored releases.
