Final answer:
On average, children aged 8 to 18 watch about four hours of television each day, with television playing a significant interactive role in their lives.
Step-by-step explanation:
Children aged 8 to 18 years watch an average of around four hours of television each day. This statistic takes into account the significant impact television has had on U.S. society, with 98 percent of homes having at least one television set by the late 1990s. It's important to note that television viewing has evolved from a passive activity to a more interactive experience, influencing social norms and values, and now with the advent of new technologies, providing intense control over what is watched. When it comes to supervised time for children, it is mentioned that 70 percent of the children spend at least a certain number of hours per day unsupervised, but this number is not specified in the information provided. Also, it is not clear what percentage of children spend more than 10 hours per day unsupervised.