Quick tip: The standard deviation formula we're using for analyzing an investment is the standard deviation of a sample of data. There's also a formula to find the standard deviation of an entire ...

In National 5 Lifeskills Maths standard deviation is a measure of consistency or spread of data. It is used as a comparison between different data sets.

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The normal distribution formula is based on two simple parameters—mean and standard deviation. Skip to content. News Markets ... 68.3% of data values are within 1 standard deviation of the mean ...