Answer:
The heights of subjects in a clinical trial of a new drug is a quantitative data.
Explanation:
Qualitative: If a data represents characteristics, color, quality and it is non-numerical in nature, then it is known as qualitative data.
For example:- favorite color, game, hobby, etc.
Quantitative: If a data represents numerical values, then it is known as qualitative data.
For example:- height, weight, age, etc.
The heights of subjects in a clinical trial of a new drug can be represented by numerical values.
Therefore the heights of subjects in a clinical trial of a new drug is a quantitative data.