Question 6 During an experiment, scientists analyzed the scalp hair samples from 22 participants with epilepsy and 23 participants without epilepsy, checking for differences in levels of copper, iran,...

Extracted text: Question 6 During an experiment, scientists analyzed the scalp hair samples from 22 participants with epilepsy and 23 participants without epilepsy, checking for differences in levels of copper, iran, zinc, magnesium, and calcium. The scientists were concerned about previous research that showed conflicting results. They speculated that other differences in the study group, besides the presence or absence of epilepsy, could have caused these mixed results. The scientists attempted to control same of these other differences by gathering all participants from the same region of Turkey (indicating similar dielary habits) and separating the participants into the following graups: • Males with epilepsy • Males without epilepsy • Fermales with epilepsy • Females without epilepsy. This is an example of what kind of sampling? Your answer: O Ssimple random sampling O Stratified random sampling O Systematic sampling Cluster sampling o Convenience sampling