LSRL bruh

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7 Terms

1
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types of correlation (r)
positive correlation: increase and decrease together
negative correlation: one variable increases, while the other decreases
2
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INTERPRET the correlation coefficient (r)
(what kind of relationship?)
close to 1: strong positive linear relationship
close to -1: strong negative linear relationship
close to 0: weak linear relationship
close to 1: strong positive linear relationship
close to -1: strong negative linear relationship
close to 0: weak linear relationship
3
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INTERPRET y value when ____ (this is when ur given (x,y) and you put it into the LSRL)
(is it in between the value range?)
interpolation or extrapolation
interpolation or extrapolation
4
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INTERPRET the meaning of the slope
(increase x, y variable)
for every increase in X variable, Y variable is predicted to increase by ____ (increase can be changed to decrease if needed)
for every increase in X variable, Y variable is predicted to increase by ____ (increase can be changed to decrease if needed)
5
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INTERPRET the residual (y-yhat)
(residual line; over or under)
overpredicted or underpredicted
overpredicted or underpredicted
6
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INTERPRET the coefficient of determination (r^2)
(%, response n explan)
____% of the variation in (response variable y) is accounted for by the variation in the (explanitory variable x)
____% of the variation in (response variable y) is accounted for by the variation in the (explanitory variable x)
7
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INTERPRET y-intercept
(0, and what; remember 0 on the x-axis)
at 0 on the x axis, y explains. (0, y value)
at 0 on the x axis, y explains. (0, y value)