Qualitative characteristics or properties are things that you describe with words,
like a person's trustworthiness, loyalty, helpfulness, friendliness, courtesy,
kindness, cheerfulness, thirftyness, bravery, cleanliness, and reverence.
'Qualitative' is like 'qualities'.
Quantitative characteristics or properties are things that you describe with
numbers, like a person's height, weight, PSA, A1C, prothrombin, BMI, APGAR,
waist measurement, hat size, and shirt size. 'Quantitative' is like 'quantities'.