The information based on the research is illustrated below.
Part A: The appropriate design for the study includes;
The treatment used; Chamomile oil treatment
Method of treatment; Application of the chamomile oil to the cervical region of patients experiencing pain due to pinched nerves
Treatment assignment; Treatment should be assigned to patients with pinched nerves
Variables that should be measured; Reduction or relief of pain as reported by the patients
Part B; The study should be administered equally to both males and females as the symptoms can be experienced by both male and female
Part C; The design could be double-blind by replacing the chamomile administered by placebo, thereby preventing bias from both researcher and participants in the results of the research.
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