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If data are grouped into intervals and the number of items in each group is listed, this could be called a ()

題型:?jiǎn)雾?xiàng)選擇題

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}

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}

以2000年a0為最初水平,2016年an為最末水平,計(jì)算鋼產(chǎn)量的年平均發(fā)展速度時(shí),須開()

題型:?jiǎn)雾?xiàng)選擇題

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

題型:?jiǎn)雾?xiàng)選擇題

對(duì)某班級(jí)學(xué)生的生活狀況進(jìn)行統(tǒng)計(jì)調(diào)查,下列標(biāo)志中屬于不變標(biāo)志的是()

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}

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 cumulative frequency of the third class?()

題型:?jiǎn)雾?xiàng)選擇題

如果居民按報(bào)告期價(jià)格購(gòu)買商品需多支出40萬(wàn)元,報(bào)告期商品銷售額為200萬(wàn)元,則價(jià)格指數(shù)為()

題型:?jiǎn)雾?xiàng)選擇題