99.7%-95%-68%_68-95-99规则–以普通英语解释正态分布

99.7%-95%-68% Meet Mason. He's an average American 40-year-old: 5 foot 10 inches tall and earning $47,000 per year before tax. 认识梅森。 他平均年龄40岁，身高5英尺10英寸，每年税前收入$ 47,000。 How often would you expect to me

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