68-95-99.7法则
68-95-99.7 rule In a normal distribution, about 68%, 95%, and 99.7% of data fall within 1, 2, and 3 standard deviations of the mean, respectively.
CSCA 数学 考试术语
68-95-99.7 rule In a normal distribution, about 68%, 95%, and 99.7% of data fall within 1, 2, and 3 standard deviations of the mean, respectively.
CSCA 数学 考试术语