It was a period of "exceptional cold" driven by "chaotic internal variability within the climate system".
But even then, there is as much if not more variability within the groups as between them.
Indeed, recent research that supports Hart and Risley's work has found a great deal of variability within classes.
For many key parameters, the climate is already moving beyond the patterns of natural variability within which our society and economy have developed and thrived.
The IPCC scientists reject this, reporting that while the warming trend is robust over decades, there is "substantial" variability within decades.
The fixation with the £9,000 figure has also concealed the extent of variability within individual universities and across the sector as a whole.
The other 80percentt belong to a "new working class," he said, that despite great variability within the group lacks the same security and high wages.
In fact, when it comes to the actual toys kids like to play with, there is more variability within a gender than there is between genders, says Sweet.
Pre-existing variability within species is ignored.
Variance and standard deviation measure variability within a distribution.
Landscape level fragmentation indices have showed variability within analysis period.
