02 SEP 2016 by ideonexus
Effects of Good Teachers on Student Outcomes
These findings would suggest that the difference in achievement gains between having a 25th percentile teacher (a not so effective teacher) and a 75th percentile teacher (an effective teacher) is over one-third of a standard deviation (0.35) in reading and almost half a standard deviation (0.48) in mathematics. Similarly, the difference in achievement gains between having a 50th percentile teacher (an average teacher) and a 90th percentile teacher (a very effective teacher) is about one-third...13 APR 2013 by ideonexus
Gary Gygax Explains Dice
As the DM, the tools of your trade are dice — platonic solid-shaped or just about any other sort. The random numbers you generate by rblling dice determine the results based on the probabilities determined herein or those you have set forth on your own. In case you are not familiar with probability curves, there are two types which are determined by your dice: linear (straight line),'which has equal probability of any given integer in the number group, and bell (ascending and descending lin...Probability, percentages, averages, there's a lot of math in this introduction to the most important tool of the gamer.
What does it mean that the average role of a 1d6 is 3.5 but the probability of any number coming up is 16.7?
12 JUN 2012 by ideonexus
Individuals VS Species
The assumptions of population thinking are diametrically opposed to those of the typologist. The populationist stresses the uniqueness of everything in the organic world. What is true for the human species,–that no two individuals are alike, is equally true for all other species of animals and plants ... All organisms and organic phenomena are composed of unique features and can be described collectively only in statistical terms. Individuals, or any kind of organic entities, form populatio...Folksonomies: taxonomy perspective
Folksonomies: taxonomy perspective
Species are classified according to a mean, the perspective is to ignore the variation within the species.