Medical researchers studying a medication in male and female patients 20 to 29 years old noticed that, up to a certain amount, a
larger concentration of an active ingredient lead to greater levels of symptom relief.
What is the explanatory variable?
A) age of patient
B) gender of patient
C) amount of symptom relief
D) concentration of active ingredient
1 answer:
Answer:
D
Step-by-step explanation:
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