What is the focus of qualitative nursing research in professional nursing practice? What methodologies are used to conduct qualitative research?

Why are ethical principles important when conducting research on human subjects?
What is the focus of qualitative nursing research in professional nursing practice?
What methodologies are used to conduct qualitative research?
Why should the BSN-prepared nurse critically appraise published research studies?
How does the BSN-prepared nurse critically appraise published research studies?