To calculate the standard deviation of those numbers: 1  1. 2  2. Then for each number: subtract the Mean and square the result. 3  3. Then work out the mean of those squared differences. 4  4. Take the square root of that and we are done!o calculate the standard deviation of those numbers: 1  1. 2  Work out the Mean (the simple average of the numbers). 3  2. Then for each number: subtract the Mean and square the result.
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From Wikipedia, the free encyclopedia. A cholescintigraphy scan, also known as: hepatobiliary iminodiacetic acid (HIDA), paraisopropyl iminodiacetic acid (PIPIDA), or diisopropyl iminodiacetic acid (DISIDA) scan is a nuclear imaging procedure to evaluate the health and function of the gallbladder.rom Wikipedia, the free encyclopedia. A cholescintigraphy scan, also known as: hepatobiliary iminodiacetic acid (HIDA), paraisopropyl iminodiacetic acid (PIPIDA), or diisopropyl iminodiacetic acid (DISIDA) scan is a nuclear imaging procedure to evaluate the health and function of the gallbladder.