A.直線趨勢模型
B.指數(shù)曲線趨勢模型
C.二次曲線趨勢模型
D.修正指數(shù)曲線趨勢模型
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A.算術(shù)平均法
B.幾何平均法
C.代數(shù)平均法
D.調(diào)和平均法
A.時點序列
B.時期序列
C.特征序列
D.平穩(wěn)序列
A.0.19
B.0.81
C.0.6561
D.0.9
A.直線趨勢
B.曲線趨勢
C.異方差
D.異常數(shù)據(jù)
使用最小二乘法估計得出的樣本回歸直線必然通過點()
A.(0,0)
B.(x,0)
C.(0,y)
D.(x,y)
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最新試題
為什么在計算平均指標的基礎(chǔ)上還有必要進一步計算變異指標?
Descriptive statistics deals with methods of()
A cumulative frequency distribution would provide().
Which of the following is not the goal of descriptive statistics?()
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
If the individual class frequency is divided by the total frequency, the result is the ().
One rule that must always be followed in constructing frequency distributions is that ().
A cumulative frequency polygon is also called ().
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?
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?()