null adj. 1.无效力的,无束缚力的。 2.无效的,无用的,无益的;无价值的。 3.没特征[个性]的,没表情的。 4.〔罕用语〕不存在的,没有的;零(位)的;空的。 n. 【数学】零,零位;空;【无线电】零讯号,微弱讯号。 a null indicator 零示器;零位指示器。 the null method 衡消法。 null and void 【律】无效;失效(This check is null and void. 本支票无效)。 vt. 使无效。
As a result, the denominator and numerator should be about equal if the null hypothesis is true . 因此,如果无效假设为真,那么分母和分子应该差不多相等。
The term null hypothesis arose from earlier agricultural and medical applic ation of statistics . 无效假设这个概念产生于早期的统计学在农业和医学方面的应用中。
The city manager should accept the null hypothesis that there is no difference between the two methods of tax listing . 市政府官员应该接受两种征税登记方法没有差别这个无效假设。
It is difficult to refuse null hypothesis of random walk when employing monthly data in empirical test ( 2 )采用月数据分析很难拒绝随机游走假设。
The limiting distribution of test statistic under null hypothesis is proved to be the function of a standard brownian 在原假设下证明了统计量的极限分布是标准brown运动的泛函。
If this increase is large enough relative to the ssr in the model with all of the variables , then we can reject the null hypothesis 如果相对于包括所有解释变量的模型,新的ssr的上升足够大的话,那么我们就能拒绝原假设
The null hypothesis is that ? 1 - ? 2 = 0 where ? 1 is the mean time to respond after consuming alcohol and ? 2 is the mean time to respond otherwise 当? 1表示喝酒者的平均反应时间,而? 2表未喝酒者的平均反应时间,则此虚无假设为? 1 - ? 2 = 0 。
In the first case the prediction of earthquakes is a null hypothesis ; in the second case the prediction of some earthquakes might be possible 在头一种情况下,预测地震是无价值的假定;在后一种情况下,对某些地震进行预测是有可能的。 ”
In the first case the prediction of earthquakes is a null hypothesis ; in the second case the prediction of some earthquakes might be possible 在头一种情况下,地震的预测是一个无意义的假定;在后一种情况下对某些地震进行预测可能是可能的。 ”
Fourth , despite these high costs , the time has passed that policy makers should still be acting on the null hypothesis that global warming will not occur 第四,尽管付出很高的代价,但是由政策制定者们来决定全球变暖的假设是否会实现的时代已经过去了。
The practice of science involves formulating and finding hypotheses, statements that are capable of being proven false using a test of observed data. The null hypothesis typically corresponds to a general or default position.