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Descriptive Statisticsmedium
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Given a dataset XXX with n=20n=20n=20, ∑i=120xi=100\sum_{i=1}^{20} x_i = 100∑i=120​xi​=100, and ∑i=120xi2=800\sum_{i=1}^{20} x_i^2 = 800∑i=120​xi2​=800. Calculate the sample variance s2s^2s2.