When conducting a study on television ratings, who would the sample be?

The choice of a specific group of people in Adelaide with televisions as the sample for a study on television ratings is a well-defined approach. In psychological and market research, a sample should ideally represent the population of interest while being manageable for data collection. By selecting a focused group, the researcher can more accurately measure and analyze viewing habits, preferences, and behaviors related to television content. This targeted sampling allows for precise insights into the local context and facilitates effective data handling, ensuring that the sample reflects relevant viewing demographics.

The other options, while they represent broader demographics, lack the practicality and specificity needed for rigorous study design. For instance, including all people in Australia would introduce vast variability that could complicate the data analysis. Similarly, targeting television network executives might limit the study's generalizability, as their viewing habits may not reflect those of the general public. Lastly, capturing all individuals with an interest in television programming could lead to a very wide and loosely defined sample, making it difficult to draw conclusive results specific to television ratings in that population.