A new Temkin Group report, Media Use Benchmark, 2013, analyzes data from 10,000 consumers about their internet usage (at home and at work), reading of books and news (online and offline), TV watching, radio listening, and mobile activity.

The findings:

Daily Media Consumption (average hours per day):

Watch TV:  3.9
Go on Internet with computer, not for work: 3.8
Listen to radio: 2.1
Go on Internet with computer for work: 2.0
Read a book or paper, not online: 1.4
Read news online: 1.4
Use app or go on Internet with mobile phone: 1.4
Read a print newspaper, not online: 1.1
Read a book online, including tablets: 0.9

Source: Center for Media Research
http://www.mediapost.com/publications/article/197522/potpourri-of-media-usage-data.html