要检验虚假设，需要知道在假设存在随机抽样可变性的情况下获得这么一个极限值的概率。
To test your null hypothesis, you want to know the probability of obtaining a value this extreme under the assumption that it is due to random sampling variability.
与其他多项目调度启发式算法的比较和统计检验，说明随机抽样算法显著优于这些常用的启发式算法。
Comparison with other tested heuristics verifies that the proposed random sampling method is significantly superior to other heuristics for scheduling resource-constrained multiple projects.
方法采用统一设计的调查表格，按照国家标准GB4789.1 - 94和GB4789.2 - 94检验方法随机抽样进行菌落总数和大肠杆菌测定。
Methods Adopt specially designed investigation form, random samples according to GB4789.1-94 and GB4789.2-94, determining the total of bacterium and coli form.
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