二维正态分布,σx和σy相等而且x、y独立,那么落在+/-σ,+/-2σ,+/-3σ区间内的累计概率各是多少?对一个最简单的二维正态分布——就是假设σx和σy相等而且x、y独立——那么在+/-σ,+/-2σ,+/-3σ区间
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![二维正态分布,σx和σy相等而且x、y独立,那么落在+/-σ,+/-2σ,+/-3σ区间内的累计概率各是多少?对一个最简单的二维正态分布——就是假设σx和σy相等而且x、y独立——那么在+/-σ,+/-2σ,+/-3σ区间](/uploads/image/z/8648566-70-6.jpg?t=%E4%BA%8C%E7%BB%B4%E6%AD%A3%E6%80%81%E5%88%86%E5%B8%83%2C%CF%83x%E5%92%8C%CF%83y%E7%9B%B8%E7%AD%89%E8%80%8C%E4%B8%94x%E3%80%81y%E7%8B%AC%E7%AB%8B%2C%E9%82%A3%E4%B9%88%E8%90%BD%E5%9C%A8%2B%2F-%CF%83%2C%2B%2F-2%CF%83%2C%2B%2F-3%CF%83%E5%8C%BA%E9%97%B4%E5%86%85%E7%9A%84%E7%B4%AF%E8%AE%A1%E6%A6%82%E7%8E%87%E5%90%84%E6%98%AF%E5%A4%9A%E5%B0%91%3F%E5%AF%B9%E4%B8%80%E4%B8%AA%E6%9C%80%E7%AE%80%E5%8D%95%E7%9A%84%E4%BA%8C%E7%BB%B4%E6%AD%A3%E6%80%81%E5%88%86%E5%B8%83%E2%80%94%E2%80%94%E5%B0%B1%E6%98%AF%E5%81%87%E8%AE%BE%CF%83x%E5%92%8C%CF%83y%E7%9B%B8%E7%AD%89%E8%80%8C%E4%B8%94x%E3%80%81y%E7%8B%AC%E7%AB%8B%E2%80%94%E2%80%94%E9%82%A3%E4%B9%88%E5%9C%A8%2B%2F-%CF%83%2C%2B%2F-2%CF%83%2C%2B%2F-3%CF%83%E5%8C%BA%E9%97%B4)
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