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Standard deviation and correlational research

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Standard deviation and correlational research

1. 1. Standard Deviation andCorrelational Research Research Writing Aiden Yeh, PhDWenzao Ursuline College of Languages
2. 2. Standard Deviation  The standard deviation is kind of the "mean of the mean," and often can help you find the story behind the data. To understand this concept, it can help to learn about what statisticians call "normal distribution" of data.  Robertniles.com offers simple explanations of how to compute SDhttp://www.robertniles.com/stats/stdev.shtml
3. 3.  A normal distribution of data means that most of the examples in a set of data are close to the "average," while relatively few examples tend to one extreme or the other.
4. 4. Robert Niles’s Example Lets say you are writing a story about nutrition. You need to look at peoples typical daily calorie consumption. Like most data, the numbers for peoples typical consumption probably will turn out to be normally distributed. That is, for most people, their consumption will be close to the mean, while fewer people eat a lot more or a lot less than the mean.
5. 5. http://www.robertniles.com/stats/stdev.shtml
6. 6. http://www.robertniles.com/stats/stdev.shtml
7. 7. http://www.robertniles.com/stats/stdev.shtml
8. 8. http://www.robertniles.com/stats/stdev.shtml
9. 9. http://www.robertniles.com/stats/stdev.shtml
10. 10. Using Excel to compute for SDhttp://www.robertniles.com/stats/stdev.shtml