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Internet Topology - Massive and Amazing Graphs. Eight Principles of Data Visualization. The Most Controversial Math Problems. Evidence Shows How the Right Use of Technology Can Increase Math Learning. Although the use of technology in math education is not new, the effectiveness of technology-enhanced teaching approaches has sometimes been controversial. Recently, SRI researchers published a series of studies that examine whether technology is effective and how it helps. Our findings show that technology can increase students’ understanding of math concepts, but only as part of a more comprehensive learning approach—one that also includes curricular content and teacher professional development. For example, it’s widely known that the use of graphing calculators correlates with better student performance on high-profile government assessments, such as the National Assessment of Educational Progress. Yet while such correlations are reassuring, they do not constitute proof of effectiveness—and many rigorous studies have shown no effect or mixed positive and negative effects for other technology in schools.

Technology can provide multiple representations of concepts. Mr. Additional Links. Dialects Of American English. Despite the fact that most of America speaks one language, there are distinctive sayings that are nearly incomprehensible to people from different parts of the country. In the South, there are phrases like "he's as drunk as Cooter Brown. " In the Midwest, you have the multipurpose "You betcha! " A fascinating map from Long Island University's Robert Delaney highlighted by Reid Wilson at The Washington Post shows that the divisions are even more complicated than you might think. He highlights 24 different distinctive dialects. If you add Alaska and Hawaii, which aren't pictured, there are even more. These aren't just accents, but genuinely distinct ways of speaking beyond just the way words sound.

"An accent refers only to the way words are pronounced," Delaney writes, "while a dialect has its own grammar, vocabulary, syntax, and common expressions, as well as pronunciation rules that make it unique from other dialects of the same language. " Here's the map: Virginia Piedmont (20) 10+ Great Metrics and Strategies for Fraud Detection. Application of Pascal’s Triangular Plus Monte Carlo Analysis to Appraise the Wisdom of Crowds. Following to the article of “Application of Pascal’s Triangular Plus Monte Carlo Analysis to Calculate the Risk of Expected Utility” on link: the purpose of this article is to appraise the wisdom of crowds by using of a simulation model which is the combination of Pascal’s Triangular method and Monte Carlo simulation model.

The most important finding is to be proved the research study conducted in 1906 by the British scientist Sir Francis Galton (1822 – 1911) in the case of the Wisdom of Crowds in which we can say there is a very good adaptability between the mathematical models and Human’s sense. I think that we can also use from this simulation model for Market Predictions. British Scientist Sir Francis Galton (1822 – 1911) In the meanwhile, you can also read this story on below link: Methodology STDEV = ((n) ^0.5) / 2.

High crime rates explained by gasoline lead. Really? Crime rates in big cities (where gasoline concentration is high) peaked about 20 years after lead was banned in gasoline, according to an econometric study by Rick Nevin. The 20 year time lag being the time elapsed between lead exposure at birth, and turning into a 20 year old criminal. At least, that's the argument proposed by some well known econometricians, based on crime rates analysis over time in large cities. In my opinion, this is another example of of study done using the wrong kind of design of experiment, where statistical science is being abused or misused by people who claim to be experts.

You can read the article here. So how would you fix this study? Here's my solution: Get a well balanced sample of 10,000 people over a 30 years across all cities, split the sample into two subsets (criminals vs. non criminals), and check (using an odds ratio) whether criminals are more likely to have been exposed to lead at birth, than non criminals. Related articles: Amusement park analytics: increasing both fun and ROI. Will analytics help amusement park dinosaurs survive the 21st century?

My recent experience at Disneyland in California makes me think that a lot of simple things can be done to improve revenue and user experience. Here are a few starting points: Optimize lines. What do you think? Related articles: How are hotel room rates determined.