easy · GMAT Quant
An automated testing station evaluates two independent production batches, Batch A and Batch B, each containing 11 components. For both batches, the mean component weight is exactly 50 grams. The sample variance of component weights is 12 grams^2 for Batch A and 18 grams^2 for Batch B.
What is the total sum of squared deviations from the mean for all 22 components combined?
- 30 grams^2
- 150 grams^2
- 300 grams^2
- 330 grams^2
- 600 grams^2
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