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15 Cards in this Set
- Front
- Back
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Positive association
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If small values of X are associated with small values of Y
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What is the general trend of a slope if the variable are positively associated
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Upward from left to Right
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Negative asscoiation
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Small values of X are associated with large values of Y.
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What is the general trend of a slope if the variables are positively associated?
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Downward from left to right
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What does a quadratic relationship look like?
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Like a U
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What does a Exponential Decay look like?
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n
n n n n n n n n |
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This measures the amount of scatter around the general trend.
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Strength
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What is direction?
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The type of association between X & Y
positive or negative |
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What are the different types of form
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linear
quadratic exponential |
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What does the complete description of a scatterplot consist of?
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Direction (positive or negative)
Form ( linear, quadratic, expontential) Strength (weak, moderate, strong) |
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y - y is called a _________ and our goal is to make
the residuals as _____________________ |
residual
small as possible |
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the predicted value of Y when x = 0
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Intercept
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The amount that Y changes (increases or decreases) when X is increased by one unit.
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slope
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Observations which stand out from the other observations in the horizontal (X) direction are called ?
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influential observations.
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an observation that lies far from the regression line in the vertical direction and hence produces a large residual.
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outlier
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