A clinical trial randomly assigns participants to a new treatment or placebo and measures blood pressure; the data collected is categorized as:

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The question asks about the data type and study design when participants are randomly assigned to a new treatment or placebo and blood pressure is measured.

Option a: Observational – qualitative. This is incorrect because the study involves random assignment to treatment, which is an intervention, not merely observation. Also, blood pressure is a quantitative measurement, not qualitative, so the data are not qualitative.

Option b: Experimental – qualitative. While the study is indeed experimental due to random assignment (an intervention), the data collected (blood pressure) are measured on a numerical scale and quantify the level of blood pressure, not a qualitative category. Thus, this option wrongly labels the data as qualitative.

Option c: Observational – quantitative. This is incorrect because the study assigns participants to treatment vs placebo (an intervention), which makes it experimental rather than observational. While the data are quantitative, the observational aspect is inaccurate due to the randomization controlling the exposure.

Option d: Experimental – quantitative. This is correct because the study involves random assignment to an intervention (new treatment or placebo), which defines an experimental design. Blood pressure is a numeric measurement, so the data are quantitative. The combination experimental and quantitative best fits the scenario.

MDM4U - Mathematics of Data Management 12 (2025-26) - A

A clinical trial randomly assigns participants to a new treatment or placebo and measures blood pressure; the data collected is categorized as:

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