26.下列變量中屬于連續(xù)變量的有（      ）

A.設(shè)備臺(tái)數(shù)                                                       B.職工人數(shù)

C.某市企業(yè)個(gè)數(shù)                                                D.某市工業(yè)總產(chǎn)值

27.數(shù)量指標(biāo)一般表現(xiàn)為（      ）

A.平均數(shù)                                                          B.相對(duì)數(shù) 

C.絕對(duì)數(shù)                                                          D.眾數(shù)

28.下列哪項(xiàng)屬于數(shù)量標(biāo)志?（      ）

A.性別                                                              B.年齡      外語學(xué)習(xí)網(wǎng)

C.職稱                                                              D.健康狀況

29.統(tǒng)計(jì)學(xué)的兩大主要內(nèi)容為（      ）

A.統(tǒng)計(jì)資料的收集和分析

B.理論統(tǒng)計(jì)和應(yīng)用統(tǒng)計(jì)

C.統(tǒng)計(jì)預(yù)測(cè)和決策

D.描述統(tǒng)計(jì)和推斷統(tǒng)計(jì)

30.數(shù)理統(tǒng)計(jì)學(xué)的奠基人是（      ）

A.威廉·配弟                                                   B.阿亨瓦爾     

C.凱特勒                                                          D.恩格爾