Question

A researcher is conducting a worldwide study of the red blood cell count in children with a certain disease.

The set of all children in the world with the disease is the [blank] for this study.

Which word correctly fills in the blank in the previous sentence?

a) data
b) population
c) parameter
d) experiment
I want say data because they got data about the disease they have.

Experiment mean- they test you on stuff.
i think its b because they are humans and human are population

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