Learn in the textbookClassifying Data by Attribute and Structure
DefinitionQuantitative data (量的データ) expresses a measured size in numbers, so adding and averaging its values gives meaningful results.
ExplanationIt is recorded as numbers with units, such as height, sales amounts, or store visitor counts. Totals, averages, and standard deviations apply as they are, and histograms or scatter plots show how the values are spread and how they relate.
AnalogyThink of the readings on a bathroom scale. With 60 kg and 70 kg, "the average is 65 kg" and "the difference is 10 kg" are results that mean something as they stand.
Memory hookIn English it is "quantitative," from the same root as "quantity": data that answers "how much."