Blood pressure level is an example of which of the following scales?: (A) Nominal, (B) Ordinal, (C) Metric, (D) None of the above
Answer is C. Metric scale: These are characteristics that can be measured in terms of a quantity. Duration of disease, haemoglobin level, hea rate and blood pressure are examples of such characteristics. Ref: Medical biostatistics, 1st edition pg: 99