Question

vision was measured in patients before and after a drug was administered. the measurements were used to calculate blurry vision reduction, which is classified as ______ data. independent quantitative control group qualitative

Explanation:

Quantitative data is numerical and can be used in calculations. Vision measurements used to calculate blurry - vision reduction are numerical values, so they are quantitative data. Independent refers to variables not affected by others. Control group is a group in an experiment not receiving the treatment. Qualitative data is non - numerical, like descriptions.

Answer:

B. quantitative