What if your population of interest is whatever you decide it is A population can be anything as long as it's defined as a population?

If a population is defined by whatever criteria you choose, it allows for flexibility in research and analysis, enabling you to focus on specific characteristics or attributes relevant to your study. However, this can also introduce biases if the criteria are not carefully considered, potentially skewing results or limiting generalizability. Clearly defining and justifying your population is essential for ensuring the validity and reliability of your findings. Ultimately, the choice of population should align with your research objectives and questions.