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標題:

Testing between two means (2)

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Each of the eight items was valued independently by an antique dealer and an antique expert. The valuations, in thousand of dollars, are shown below.Item------- 1-----2-----3-----4-----5-----6-----7------8Dealer---875--575--970--425--460--255--1050--350Export---685--510--775--355--540--195--825---425(a) Carry... 顯示更多 Each of the eight items was valued independently by an antique dealer and an antique expert. The valuations, in thousand of dollars, are shown below. Item------- 1-----2-----3-----4-----5-----6-----7------8 Dealer---875--575--970--425--460--255--1050--350 Export---685--510--775--355--540--195--825---425 (a) Carry out the appropriate test at 5% level of significance to investigate the claim that the dealer's valuations are, on average, greater than the expert. (b) State the necessary assumption required for (a).

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