[DF] Added gtest for StdDev precision
[DF] Added gtest for StdDev precision

root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,root-mirror/root,olifre/root,karies/root,karies/root,olifre/root,olifre/root,olifre/root,karies/root,karies/root,karies/root,root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,olifre/root,karies/root,root-mirror/root,karies/root,olifre/root,olifre/root,olifre/root,karies/root,root-mirror/root,karies/root,olifre/root