Ratio.
All pressure readings are on the ratio scale. There is a starting point, atmospheric pressure. If there blood pressure increases by 10%, there is 10% more force being exerted.
I note a related one - temperature is a tricky one. If I have degrees C, then it is on the interval scale, but if I convert to degrees K, then it can be considered on the ratio scale, as there is a starting point, and a doubling K has meaning.
I'M NEW, AND DID NOT WANT TO REMOVE THE FIRST ANSWER, BUT I AM CERTAIN IT IS INCORRECT. HERE IS WHY:
Actually, the scale is INTERVAL, because of the above-mentioned fact that the starting point is the atmospheric pressure. Atmospheric pressure is not an absolute zero point. Say you are at the sea level, where normal air pressure is 1 atm=101.325kPa=760mmHg (millimeters of Mercury are usually used to report blood pressure), and your Systolic Blood Pressure is 68mmHg (so the absolute value is: 760mmHg of starting point + 68mmHg of your blood pressure = 828mmHg). Now, let's say your Systolic Blood Pressure jumped 10%, that is to 74.8mmHg (the new absolute value is: 760mmHg of the same starting point + 74.8mmHg of your new blood pressure = 834.8mmHg), and the absolute ratio is not maintained, i.e.: 834.8mmHg / 828mmHg = 1.008. That is the absolute increase is about 0.8%. The differences become even more significant at higher elevations, where the air pressure is lower.
Approximately 3/2.
systolic pressure when ventricals are contracting while during diastole they are in relaxed state
A blood pressure measures the amount of pressure on your arteries when your heart is pumping and contracting blood. There are two measurements. One is the diastolic. The diastolic is the measurement of the pressure on your arteries when your heart is relaxed. This number should be low, in between 50 and 90. It is the bottom number in the ratio. The systolic measurement is the top number in the ratio. The systolic measurement is the amount of pressure on the arteries when the heart is beating or contracted. This number should be between 100 and 150. The text book normal blood pressure is 120/80=S/D. hope that helps.
It is ratio.
interval
interval
ratio
interval
Nominal Scale < Ordinal< Interval < Ratio
Ratio. It has a true zero.
No.
It is a ratio scale of measurement.