Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Psychology

प्रसरण हेतु सही सूत्र कौन सा है?

1
Variance = \(\frac{(\Sigma x- \Sigma \bar{x})^2}{N}\)
2
Variance = \(\frac{\Sigma( x- \bar{x})^2}{N}\)
3
Variance = \(\frac{(\Sigma x- \bar{x})^2}{N^2}\)
4
Variance = \(\frac{(\Sigma x^2- \bar{x}^2)}{N}\)
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