Standard Deviation and CorrelStandard Deviation and Correlational Researchational Research

Research WritingResearch Writing

Aiden Yeh, PhDAiden Yeh, PhD

Wenzao Ursuline College of LanguagesWenzao Ursuline College of Languages

Standard DeviationStandard Deviation

The standard deviation is kind of the "mean The standard deviation is kind of the "mean of the mean," and often can help you find thof the mean," and often can help you find the story behind the data. To understand this e story behind the data. To understand this concept, it can help to learn about what staticoncept, it can help to learn about what statisticians call "normal distribution" of data. sticians call "normal distribution" of data.

Robertniles.com offers simple explanations Robertniles.com offers simple explanations of how to compute SDof how to compute SD

http://www.robertniles.com/stats/stdev.shtml

A normal distribution of data means that moA normal distribution of data means that most of the examples in a set of data are close st of the examples in a set of data are close to the "average," while relatively few examplto the "average," while relatively few examples tend to one extreme or the other. es tend to one extreme or the other.

Robert Niles’s ExampleRobert Niles’s Example

Let's say you are writing a story about nutritiLet's say you are writing a story about nutrition. You need to look at people's typical daily on. You need to look at people's typical daily calorie consumption. Like most data, the nucalorie consumption. Like most data, the numbers for people's typical consumption probmbers for people's typical consumption probably will turn out to be normally distributed. ably will turn out to be normally distributed. That is, for most people, their consumption That is, for most people, their consumption will be close to the mean, while fewer peoplwill be close to the mean, while fewer people eat a lot more or a lot less than the mean. e eat a lot more or a lot less than the mean.

http://www.robertniles.com/stats/stdev.shtml

http://www.robertniles.com/stats/stdev.shtml

http://www.robertniles.com/stats/stdev.shtml

http://www.robertniles.com/stats/stdev.shtml

http://www.robertniles.com/stats/stdev.shtml

Using Excel to compute for SDUsing Excel to compute for SD

http://www.robertniles.com/stats/stdev.shtml

https://www.khanacademy.org/math/probability/descriptive-statistics/variance_std_deviation/v/statistics--standard-deviation