A patient’s blood pressure measured daily over several weeks averaged 182 with a
standard deviation of 12.6, while that of another patient averaged 124 with a standard deviation of
9.4. Which patient’s blood pressure is relatively more variable?
Answers
Given : A patient’s blood pressure measured daily over several weeks averaged 182 with a standard deviation of 12.6, while that of another patient averaged 124 with a standard deviation of 9.4
To find : Which patient’s blood pressure is relatively more variable
Solution:
coefficient of variation = (σ / Mean ) *100
Patient averaged 182 with a standard deviation of 12.6
= (12.6/182)*100 = 6.92
Patient averaged 124 with a standard deviation of 9.4.
= (9.4/124)*100 = 7.5
7.5 > 6.92
More the coefficient of variation , more the Variability
Hence Patient averaged 124 with a standard deviation of 9.4.
has blood pressure is relatively more variable
than Patient averaged 182 with a standard deviation of 12.6
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