Standard Deviation Calculation

Calculating the Standard deviation

The Standard Deviation, also known as "SD" or as "s", is the average amount of variability in a set of scores or the average distance of each score from the mean (Salkind & Frey, 2019). Here is the formula to calculate Standard Deviation: Reference: Salkind, N. J. & Frey, B. B. (2019). Statistics for people who (think they) hate statistics (7th Ed.) SAGE Publications. Salkind, N. J. & Frey, B. B. (2019). Statistics for people who (think they) hate statistics (7th Ed.) SAGE Publications. Salkind, N. J. & Frey, B. B. (2019). Statistics for people who (think they) hate statistics (7th Ed.) SAGE Publications.

List your data and calcualte the mean

Get the mean

Find the difference

square the difference

Divide by n-1

take the square root

ALL done!!!

Take each score and subtract the mean to find the difference for each

Square the differnce of each and then add them up

Take the sum of the squared differences and divide them by n-1

Take the square root of this number

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Almost done!

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Final Step! Take the square root of the number you got in step 4.

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The Standard Deviation, also known as "SD" or "s", is the average amount of variability in a set of scores or the average distance of each score from the mean (Salkind & Frey, 2019). The formula to calculate Standard Deviation: Salkind, N. J. & Frey, B. B. (2019). Statistics for people who (think they) hate statistics (7th Ed.) SAGE Publications.