I would like to calculate the standard deviation of a series of individual percentages. For each individual, the percentage corresponds to a traceability compliance defined by the quotient of the number of acts traced over the number of acts that must be traced.

I have the compliance for 8 individuals. I wanted to do a classic standard deviation but it seems to me that it is statistically wrong to do this....

Ind Trace To trace Compliance

1 8 10 0.8

2 0 6 0

3 1 13 0.0769

4 1 9 0.1111

5 9 14 0.6429

6 8 15 0.5333

7 8 21 0.3810

8 0 9 0

Can you help me ?

Thanks