Is blood pressure is a qualitative variable?

No, blood pressure is not a qualitative variable.

Qualitative variables are variables that are not expressed numerically. For example, gender, eye color, and hair color are all qualitative variables.

Quantitative variables are variables that are expressed numerically. For example, height, weight, and age are all quantitative variables.

Blood pressure is a quantitative variable because it is expressed numerically in units such as millimeters of mercury (mm Hg).