hard · GMAT Quant
A clinical study records patient recovery times for two dosage protocols, Protocol A and Protocol B. Protocol A is administered to 10 patients and yields a sample variance of 27 hours squared. Protocol B is administered to 16 patients and yields a population variance of 18 hours squared. If both protocols produce identical mean recovery times
What is the sample variance, in hours squared, of the combined dataset of 26 patients?
- 20.42
- 20.52
- 21.24
- 21.46
- 21.60
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