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Ten Most Extreme Substances Known to Man

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Types of Mathematical Averages and Their Formulas In mathematics, the average of two or more numbers is called the mean. The most commonly used mean is called the arithmetic mean, in which you add up all the values and divide by the number of values. For example, the arithmetic mean of 2, 5, and 14 is (2+5+14)/3 = 7. However, there is more than one kind of mean, including the geomtric mean, harmonic mean, root mean square, and several others. The essential property of any mean is that it must fall between the highest value and the lowest value. Age of Distraction: Why It’s Crucial for Students to Learn to Focus Digital classroom tools like computers, tablets and smartphones offer exciting opportunities to deepen learning through creativity, collaboration and connection, but those very devices can also be distracting to students. Similarly, parents complain that when students are required to complete homework assignments online, it’s a challenge for students to remain on task. The ubiquity of digital technology in all realms of life isn’t going away, but if students don’t learn how to concentrate and shut out distractions, research shows they’ll have a much harder time succeeding in almost every area. “The real message is because attention is under siege more than it has ever been in human history, we have more distractions than ever before, we have to be more focused on cultivating the skills of attention,” said Daniel Goleman, a psychologist and author of Focus: The Hidden Driver of Excellence and other books about social and emotional learning on KQED’s Forum program.



Populations and Samples The study of statistics revolves around the study of data sets. This lesson describes two important types of data sets - populations and samples. Along the way, we introduce simple random sampling, the main method used in this tutorial to select samples. Population vs Sample 6 Things the Most Productive People Do Every Day Ever feel like you’re just not getting enough done? Know how many days per week you’re actually productive? About 3: People work an average of 45 hours a week; they consider about 17 of those hours to be unproductive (U.S.: 45 hours a week; 16 hours are considered unproductive). We could all be accomplishing a lot more — but then again, none of us wants to be a workaholic either. It’d be great to get tons done and have work/life balance.


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