懂matlab的进!1,设有标着1,2,3,一直到9的9只球放在一个盒子中,从其中有放回地取出4只球,重复取100次,求所得号码之和X的数学期望及其方差.2,样本直径:12,34,56,89,78.6,45.5,34,67的样本均值与样本方
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![懂matlab的进!1,设有标着1,2,3,一直到9的9只球放在一个盒子中,从其中有放回地取出4只球,重复取100次,求所得号码之和X的数学期望及其方差.2,样本直径:12,34,56,89,78.6,45.5,34,67的样本均值与样本方](/uploads/image/z/7830491-59-1.jpg?t=%E6%87%82matlab%E7%9A%84%E8%BF%9B%211%2C%E8%AE%BE%E6%9C%89%E6%A0%87%E7%9D%801%2C2%2C3%2C%E4%B8%80%E7%9B%B4%E5%88%B09%E7%9A%849%E5%8F%AA%E7%90%83%E6%94%BE%E5%9C%A8%E4%B8%80%E4%B8%AA%E7%9B%92%E5%AD%90%E4%B8%AD%2C%E4%BB%8E%E5%85%B6%E4%B8%AD%E6%9C%89%E6%94%BE%E5%9B%9E%E5%9C%B0%E5%8F%96%E5%87%BA4%E5%8F%AA%E7%90%83%2C%E9%87%8D%E5%A4%8D%E5%8F%96100%E6%AC%A1%2C%E6%B1%82%E6%89%80%E5%BE%97%E5%8F%B7%E7%A0%81%E4%B9%8B%E5%92%8CX%E7%9A%84%E6%95%B0%E5%AD%A6%E6%9C%9F%E6%9C%9B%E5%8F%8A%E5%85%B6%E6%96%B9%E5%B7%AE.2%2C%E6%A0%B7%E6%9C%AC%E7%9B%B4%E5%BE%84%EF%BC%9A12%2C34%2C56%2C89%2C78.6%2C45.5%2C34%2C67%E7%9A%84%E6%A0%B7%E6%9C%AC%E5%9D%87%E5%80%BC%E4%B8%8E%E6%A0%B7%E6%9C%AC%E6%96%B9)
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