easy · GMAT Quant
A biostatistician measures blood pressure reductions across three treatment cohorts. The initial within-group sum of squares (mathrmSSW) is 3,600, and between-group sum of squares (mathrmSSB) is 1,400. If removing an erroneous outlier reduces mathrmSSW by 400 while keeping mathrmSSB unchanged
What is the revised total sum of squares (mathrmSST)?
- 5,000
- 4,600
- 1,800
- 5,400
- 3,200
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