According to Nielsen, the US adult black population spends 6 hours and 47 minutes watching Live TV, far above the roughly 3.5 hours for Hispanics and 2 hours 12 minutes for Asians.  When including Time-shifted TV, Blacks spend over 7 hours in front of the big screen.

Hispanics spend just over 2 hours a day using their smartphone for app/Web consumption, vs. 1 hour 49 minutes for blacks and 1 hour 26 minutes for Asians.

The one area where Asians led was in *Multimedia Devices, where they spend 23 minutes, as opposed to 13 minutes for Hispanics and only 12 minutes for blacks.

*Multimedia Device is defined as viewing on Apple TV, Roku, Google Chromecast, Smartphone, Computer/Laptops, etc. connected to the TV.

Source: Nielsen Q1 2016 Total Audience Report