Final answer:
In the Arbitron report, 'share' refers to the percentage of the total estimated listening audience for a radio station at a given time.
Step-by-step explanation:
In an Arbitron report, 'share' refers to E. the percentage of the total estimated listening audience. This represents the proportion of the audience that is listening to a particular radio station at a given time, out of the total number of radio listeners in a survey area. It is used by broadcasters and advertisers to gauge the popularity and reach of a radio station or a particular program. The share is a crucial metric in the radio industry as it helps in making programming decisions and in determining ad rates. For instance, if a local radio station has a share of 20%, this means that 20% of people who are listening to the radio in that area are tuned into that station during a given time slot. This metric is particularly important when understanding radio audiences because it indicates where a radio station stands in competition with others in terms of listener preferences.