初中方差的计算公式不是s^2=1/n[(x1-m)^2+(x2-m)^2+...+(xn-m)^2] ,要化简过后的公式,有急用!
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![初中方差的计算公式不是s^2=1/n[(x1-m)^2+(x2-m)^2+...+(xn-m)^2] ,要化简过后的公式,有急用!](/uploads/image/z/1624994-26-4.jpg?t=%E5%88%9D%E4%B8%AD%E6%96%B9%E5%B7%AE%E7%9A%84%E8%AE%A1%E7%AE%97%E5%85%AC%E5%BC%8F%E4%B8%8D%E6%98%AFs%5E2%3D1%2Fn%5B%28x1-m%29%5E2%2B%28x2-m%29%5E2%2B...%2B%28xn-m%29%5E2%5D+%2C%E8%A6%81%E5%8C%96%E7%AE%80%E8%BF%87%E5%90%8E%E7%9A%84%E5%85%AC%E5%BC%8F%2C%E6%9C%89%E6%80%A5%E7%94%A8%21)
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