A.小于1
B.等于1
C.大于1
D.不等于1
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A.普查
B.抽樣調(diào)查
C.重點(diǎn)調(diào)查
D.典型調(diào)查
A.年齡
B.學(xué)習(xí)成績(jī)
C.專業(yè)
D.個(gè)人愛好
A.是等距分組
B.第一組假定下限是0
C.相鄰組限是重疊的
D.分組標(biāo)志為連續(xù)型變量
E.某學(xué)生的成績(jī)80分應(yīng)歸在70-80這一組
A.15次方
B.16次方
C.17次方
D.18次方
A.1.2
B.0.8
C.1.25
D.0.83
最新試題
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（）
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)？
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？（）
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于（）
Which of the following statements is not true？（）
為什么在計(jì)算平均指標(biāo)的基礎(chǔ)上還有必要進(jìn)一步計(jì)算變異指標(biāo)？
One advantage of a stem and leaf plot over a frequency distribution is that （）.
A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of （）.
A cumulative frequency polygon is also called （）.
A cumulative frequency distribution would provide（）.