25th May 2025

A new anti-depressant medication was developed, and researchers have developed a study to compare its efficacy with standard therapies.

A new anti-depressant medication was developed, and researchers have developed a study to compare its efficacy with standard therapies. A group of patients with confirmed depression was given sertraline, while a separate group was given the new medication. After six months, the PHQ-9 questionnaire was used to determine the severity of the patient’s symptoms.

Which statistical test is most appropriate to identify a significant difference between the two groups?

Select the SINGLE most appropriate option from the list below. Select ONE option only.