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Distributionshard
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Which of the following describes the distribution of the sample variance S2=1n−1∑i=1n(Xi−Xˉ)2S^2 = \frac{1}{n-1}\sum_{i=1}^n (X_i - \bar{X})^2S2=n−11​∑i=1n​(Xi​−Xˉ)2 for Xi∼N(μ,σ2)X_i \sim N(\mu, \sigma^2)Xi​∼N(μ,σ2)?