The standard deviation is a measurement of the dispersion of data around the mean value. It is useful for comparing data sets that have the same mean but a different range. The mean of the following two numbers, for example, is the same: 8, 12, 12, 13, 15 and 2, 10, 12, 20, 30. The second, on the other hand, is clearly more dispersed.
Table of Contents
Steps to Calculate Standard Deviation
- Calculate the the average of the numbers
- Then for each number: subtract the Mean and square the result.
- Calculate the mean of those squared differences.
- Take the square root of that.
- μ (the greek letter “mu”) is the mean of all our values
- xi is the individual value of given dat
- Σ (sigma) is the symbol to add all values
- σ (the Greek letter sigma) is the symbol for Standard Deviation
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PhD Student at University College Dublin and Author at What's Insight
PhD Student who loves to write about science, technology and more. Studying at the University College in Dublin. Hope you enjoy my content.
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