最新試題

某班的學(xué)習(xí)按考試成績(jī)分為60分以下,60-70,70-80,80-90,90-100,這種分組()

題型:多項(xiàng)選擇題

The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the approximate range of the number of phone calls arriving each hour?()

題型:?jiǎn)雾?xiàng)選擇題

某企業(yè)2018年技術(shù)工占50%,2019年新招收了一批學(xué)徒工,使學(xué)徒工的比重增加了10%。假定全廠各級(jí)工資水平均無(wú)變化,則2019年職工總平均工資將()

題型:?jiǎn)雾?xiàng)選擇題

什么是季節(jié)變動(dòng)?研究它的意義何在?如何測(cè)定季節(jié)變動(dòng)?

題型:?jiǎn)柎痤}

Which of the following is not the goal of descriptive statistics?()

題型:?jiǎn)雾?xiàng)選擇題

企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過(guò)四個(gè)車間,這四個(gè)車間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少?

題型:?jiǎn)柎痤}

A summary measure that is computed from a sample to describe a characteristic of the population is called()

題型:?jiǎn)雾?xiàng)選擇題

常用的長(zhǎng)期趨勢(shì)測(cè)定的方法有哪些?各有什么特點(diǎn)?

題型:?jiǎn)柎痤}

If the individual class frequency is divided by the total frequency, the result is the ().

題型:?jiǎn)雾?xiàng)選擇題

變量數(shù)列中,各組頻率之和應(yīng)()

題型:?jiǎn)雾?xiàng)選擇題