FTA: > The night the program aired, the C.E. Hooper ratings service telephoned 5,000 households for its national ratings survey. From [https://en.wikipedia.or

FTA: > The night the program aired, the C.E. Hooper ratings service telephoned 5,000 households for its national ratings survey. From [https://en.wikipedia.org/wiki/C._E._Hooper https://en.wikipedia.org/wiki/C._E._Hooper]: > Compared to the earlier Crossley ratings, Hooperatings had the advantage of not depending on respondents remembering what they had listened to earlier in the day. However, they still only sampled an urban rather than rural population. They also failed to account for the millions of households at the time which had a radio set but no telephone. Seems like the answer is somewhere in the middle.