It depends in which context your talking about, in the psychological context
Quantitative data is number data such as results from a test, percentages
Qualitative data is data where you take notes of what someone is saying or how they have been acting etc not involving numbers.
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PH is a number, so it is quantitative.
They are methods for analysing statistics in which that data are, respectively, qualitative and quantitative.
qualitative
qualitative
quantitative.