The very first step to approach many business research questions is to verify the sample, sampling method, variables, etc. Suppose a pharmaceutical company is developing a drug for COVID-19. To understand their customer base, one of the important variables they need to know is the percentage of the infected people who end up needing medical care. Verify population, sample, variable(s), and scale of measurements required to answer this question.

What other statistical variables related to COVID are important for this company? Discuss the population, required sample, etc.