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Unformatted text preview: of the data Scatterplots the most useful graph for displaying the relationship between two quantitative variables. The value of one variable appears on the horizontal axis, the value of the other variable appears on the vertical axis. Each dot represents an individuals responses Explanatory (independent) variable goes on the X-axis and response (dependent) variable on Y Axis Clusters in a graph suggest that the data describe several distinct kinds of individuals (SAT vs. ACT) Positive Association- occurs when above average values of one variable tend to accompany above average values of the other. Negative Association- when above average values of one accompany below average values of the other The strength of a relationship is determined by how closely the points follow a clear form (linear). How close the points are to the line of best fit...
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This note was uploaded on 10/16/2008 for the course PAM 2100 taught by Professor Abdus,s. during the Fall '08 term at Cornell University (Engineering School).
- Fall '08