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 N| natality | 出生率 |  | natural logarithm | 自然对数 |  | negative correlation | 负相关 |  | negative skewness | 负偏志 |  | no correlation | 无相关 |  | non-linear correlation | 非线性相关 |  | non-parametric statistics | 非参数统计 |  | normal curve | 正态曲线 |  | normal deviate | 正态离差 |  | normal distribution | 正态分布 |  | normal population | 正态总体 |  | normal probability curve | 正态概率曲线 |  | normal range | 正常范围 |  | normal value | 正常值 |  | normal kurtosis | 正态峰 |  | normality test | 正态性检验 |  | nosometry | 患病率 |  | null hypothesis | 无效假设,检验假设 | 
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