null adj. 1.無效力的,無束縛力的。 2.無效的,無用的,無益的;無價(jià)值的。 3.沒特征[個(gè)性]的,沒表情的。 4.〔罕用語〕不存在的,沒有的;零(位)的;空的。 n. 【數(shù)學(xué)】零,零位;空;【無線電】零訊號(hào),微弱訊號(hào)。 a null indicator 零示器;零位指示器。 the null method 衡消法。 null and void 【律】無效;失效(This check is null and void. 本支票無效)。 vt. 使無效。
As a result, the denominator and numerator should be about equal if the null hypothesis is true . 因此,如果無效假設(shè)為真,那么分母和分子應(yīng)該差不多相等。
The term null hypothesis arose from earlier agricultural and medical applic ation of statistics . 無效假設(shè)這個(gè)概念產(chǎn)生于早期的統(tǒng)計(jì)學(xué)在農(nóng)業(yè)和醫(yī)學(xué)方面的應(yīng)用中。
The city manager should accept the null hypothesis that there is no difference between the two methods of tax listing . 市政府官員應(yīng)該接受兩種征稅登記方法沒有差別這個(gè)無效假設(shè)。
It is difficult to refuse null hypothesis of random walk when employing monthly data in empirical test ( 2 )采用月數(shù)據(jù)分析很難拒絕隨機(jī)游走假設(shè)。
The limiting distribution of test statistic under null hypothesis is proved to be the function of a standard brownian 在原假設(shè)下證明了統(tǒng)計(jì)量的極限分布是標(biāo)準(zhǔn)brown運(yùn)動(dòng)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 如果相對(duì)于包括所有解釋變量的模型,新的ssr的上升足夠大的話,那么我們就能拒絕原假設(shè)
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 當(dāng)? 1表示喝酒者的平均反應(yīng)時(shí)間,而? 2表未喝酒者的平均反應(yīng)時(shí)間,則此虛無假設(shè)為? 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 在頭一種情況下,預(yù)測地震是無價(jià)值的假定;在后一種情況下,對(duì)某些地震進(jìn)行預(yù)測是有可能的。 ”
In the first case the prediction of earthquakes is a null hypothesis ; in the second case the prediction of some earthquakes might be possible 在頭一種情況下,地震的預(yù)測是一個(gè)無意義的假定;在后一種情況下對(duì)某些地震進(jìn)行預(yù)測可能是可能的。 ”
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,盡管付出很高的代價(jià),但是由政策制定者們來決定全球變暖的假設(shè)是否會(huì)實(shí)現(xiàn)的時(shí)代已經(jīng)過去了。
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.