Compare the quantitative and qualitative research in healthcare service. The answer may be in narrative or a table format. Provide the information on:

1. When each approach is used? Can they be applied to the same researchable question? Explain why yes or no.
2. What type of data is used for each research style? How the data is selected and processed in each research type?
3. What challenges in data selection researches need to be aware of? How to overcome them?