This paper proposes a test statistics for testing exponential distribution versus HNBUE, and proves the statistics approximate normal distribution and consistence.

本文提出从HNBUE分布类中检验指数分布的方法，证明检验统计量的渐近正态性和检验的相合性。

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Coordinates of a normal probability paper are calculated with a approximate formula of normal distribution integral curve and drawn on screen.

采用正态分布积分曲线的近似公式计算概率格纸的坐标，并在屏幕绘图。

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The distributions of both fertilizer and water applied through sprinkler system can be represented by an approximate similar normal distribution function.

通过分析化肥施入量与灌水量的统计分布规律发现，它们都可以用正态分布来表示。

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