Answer
Non-Hispanic black
Work Step by Step
Hispanic
$z=\frac{y-\mu}{\rho}=\frac{31.3-96.7}{31.60}=-2.07$
Non-Hispanic black
$z=\frac{y-\mu}{\rho}=\frac{17.4-64.4}{16.21}=-2.90$
Non-Hispanic white
$z=\frac{y-\mu}{\rho}=\frac{4.3-29.0}{11.55}=-2.13$
Non-Hispanic black have the most extreme low rate.
