Roughly, I decided to use groups install to get everything I needed.
$ sudo yum groups install "Development tools" -y $ sudo yum groups install "Development Libraries" -y $ sudo yum install sqlite sqlite-devel -y $ sudo yum install lapack-devel blas-devel fftw-devel atlas-devel suitesparse-devel swig -y $ pyenv local 2.7.8 $ pip install numpy scipy scikit-learn
It took me quite a while to figure out what fftw-devel was needed.
To force reinstall with pip, use the command below
$ pip install --upgrade --force-reinstall numpy scipy scikit-learn