A.平均差大于標準差
B.平均差小于標準差
C.平均差等于標準差
D.二者關系不定
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A.左偏分布
B.右偏分布
C.對稱分布
D.均勻分布
A.0
B.1
C.-1
D.0.5
A.眾數(shù)
B.中位數(shù)
C.極值
D.均值
A.簡單算術平均數(shù)
B.加權算術平均數(shù)
C.簡單調(diào)和平均數(shù)
D.加權調(diào)和平均數(shù)
A.兩點分布
B.二項分布
C.超幾何分布
D.泊松分布
最新試題
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 ().
以2000年a0為最初水平,2016年an為最末水平,計算鋼產(chǎn)量的年平均發(fā)展速度時,須開()
Which of the following statements is not true?()
要了解某地區(qū)全部大學生的就業(yè)情況,那么()
什么是季節(jié)變動?研究它的意義何在?如何測定季節(jié)變動?
為什么在計算平均指標的基礎上還有必要進一步計算變異指標?
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
A cumulative frequency distribution would provide().
變量數(shù)列中,各組頻率之和應()
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()