Introduction to Statistical Analysis
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Read this overview of statistical analysis. While it can be a form of analysis used by intelligence analysts, what differentiates us is the types of data we often find ourselves using. Sometimes it is detailed internal data already neatly cleaned and standardized, but more often, it is qualitative data that we have to normalize ourselves. This is the
3. Measures of Spread and Data
3.1 Variance and Standard Deviation
These videos explain the difference between the variance of a population of a sample, how to estimate the variance of a population based on a sample, and how to find the standard deviation and why it is important.
- Video 1: Variance of a Population
- Video 2: Sample Variance
- Video 3: Standard Deviation
Source: Khan Academy
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