null adj. 1.無(wú)效力的,無(wú)束縛力的。 2.無(wú)效的,無(wú)用的,無(wú)益的;無(wú)價(jià)值的。 3.沒(méi)特征[個(gè)性]的,沒(méi)表情的。 4.〔罕用語(yǔ)〕不存在的,沒(méi)有的;零(位)的;空的。 n. 【數(shù)學(xué)】零,零位;空;【無(wú)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(wú)效;失效(This check is null and void. 本支票無(wú)效)。 vt. 使無(wú)效。
As a result, the denominator and numerator should be about equal if the null hypothesis is true . 因此,如果無(wú)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(wú)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(méi)有差別這個(gè)無(wú)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(wú)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(cè)地震是無(wú)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(cè)是有可能的?!?i class="labawb" onClick="playMp3('sound_c_8')">
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(cè)是一個(gè)無(wú)意義的假定;在后一種情況下對(duì)某些地震進(jìn)行預(yù)測(cè)可能是可能的?!?i class="labawb" onClick="playMp3('sound_c_9')">
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(lái)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(guò)去了。