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9 Cards in this Set
- Front
- Back
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If a relationship is linear
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the relation can be most accurately represented by a straight line
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In an imperfect relationship
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a relationship exists, but all of the points do not fall on the line
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A correlation b/w college entrance exam grades and scholastic achievement was found to be -1.08. On the basis of this, you would tell the university that
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they should hire a new statistician (can't be over or under 1 or -1)
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In order for the correlation coefficient to be negative, which of the following must be true?
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E XY <(EX)(EY)/N
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The regression of Y on X
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predicts Y given X
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If sy/x=0.0, the relationship b/w the variables is
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perfect
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If by is negative, higher values of X are associated with
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lower values of Y
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If N=8, EX=160, EX^2=4656, EY=79, EY^2=1309, and EXY=2430, what is the value of by?
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by=.5838
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If the regression equation for a set of data is Y'=2.650X+11.250, then the value of Y' for X=33 is
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Y'=98.70
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