/usr/include/shogun/statistics/ is in libshogun-dev 3.2.0-7.3build4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/shogun/statistics/HSIC.h
/usr/include/shogun/statistics/KernelIndependenceTestStatistic.h
/usr/include/shogun/statistics/KernelMeanMatching.h
/usr/include/shogun/statistics/KernelTwoSampleTestStatistic.h
/usr/include/shogun/statistics/LinearTimeMMD.h
/usr/include/shogun/statistics/MMDKernelSelection.h
/usr/include/shogun/statistics/MMDKernelSelectionComb.h
/usr/include/shogun/statistics/MMDKernelSelectionCombMaxL2.h
/usr/include/shogun/statistics/MMDKernelSelectionCombOpt.h
/usr/include/shogun/statistics/MMDKernelSelectionMax.h
/usr/include/shogun/statistics/MMDKernelSelectionMedian.h
/usr/include/shogun/statistics/MMDKernelSelectionOpt.h
/usr/include/shogun/statistics/QuadraticTimeMMD.h
/usr/include/shogun/statistics/TestStatistic.h
/usr/include/shogun/statistics/TwoDistributionsTestStatistic.h