medium · GMAT Quant
A financial research firm analyzes monthly stock returns across two industry portfolios: Tech (n_T = 20, barx_T = 12%) and Energy (n_E = 30, barx_E = 22%), yielding an overall mean portfolio return of barx = 18%. If the total sum of squared deviations across all 50 stocks is mathrmSST = 4,200
What is the within-portfolio sum of squared deviations (mathrmSSW)?
- 2,160
- 3,000
- 2,520
- 4,200
- 6,360
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