Determine whether the samples are independent or dependent.
-The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients before and after drug treatment. The data consist of before and after intensities for each patient.
A) Dependent samples
B) Independent samples

Question

Quizplus · Accepted Answer

The samples in this scenario are dependent because we are measuring the same variable (headache intensity) in the same group of people (patients) before and after drug treatment. The before and after measurements are paired for each patient, so the outcomes are not independent.

Determine Whether the Samples Are Independent or Dependent