According to the national statistics from 2009, the broadcast networks in American averaged13.50 minutes of commercials during a one-hour program.

According to the national statistics from 2009, the broadcast networks in American averaged 13.50 minutes of commercials during a one-hour program. I was curious whether the commercial time is significantly different now (2018) compared to 2009. So I measured the commercial time during a one-hour period during prime time on 9 different networks and recorded the number of minutes. I assume that the commercial time across all the broadcast networks in America is normally distributed and I set the significance level at α = .05.

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