<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: The incidence rates of Clostridium difficile are measured in both hospitals and nursing homes throughout a particular county. Those with low rates of infection were marked as having an effective nosocomial infection prevention strategy, while those with high rates were marked as having an ineffective strategy 
If the Department of Health Services wishes to determine whether hospitals or nursing homes have a more effective nosocomial infection prevention strategy, which of the following would be most appropriate?
Options:
A. Chi-squared test
B. One-way analysis of variance
C. Paired t-test
D. Pearson correlation
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is A: Chi-squared test. Explanation: No detailed explanation provided.<|im_end|>
