easy · GMAT Quant
An agricultural research team monitors soil moisture variation across two test plots. Plot A contains 25 measurement sensors with a moisture variance of 8 square units. Plot B contains 75 measurement sensors with a moisture variance of 4 square units. Given SS = n × v
What is the total within-group sum of squared deviations for Plot A and Plot B combined?
- 500
- 12
- 1,200
- 300
- 6
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