When I have a sample data set of responses to a Likert question as follows:






Do I calculate standard deviation this way: 0+0+0+3+3+3+0+0+0+0+5+5

Or do I calculate it this way: 3+3+3+5+5
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1 Answer

You add the zeroes.  they count when you divide by total number of elements
by Level 10 User (55.7k points)

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