What type of evidence does Minow use to develop the idea that what is on television lacks value?

Newton Minow used the statistics on time dedicated to different kinds of TV shows in prime evening time to show that what is on TV often lacks value.

Explanation:

Minow explained that in prime time which comes in the evening, out of total of 73 and a half hours available for all the channels that ran in 1961, 59 hours were scheduled for movies, comedies quizzes and action adventures.

By using this evidence, he is able to draw a conclusion that Television prime time is not about giving good information or being useful but being entertaining.