Unit 2: Exploring 2 Variable Data Flashcards
“Describe the relationship between…”
DUFS +C
DUFS +C
Direction, Unusual features, Form, Strength, +Context
What graphical display can be used with bivariate data?
Scatterplot
Find a residual by…
actual y - predicted y (AP)
Best way to see what form (linear or non-linear) is appropriate for a scatterplot is by looking at a…
residual plot
What form of the relationship does this residual plot show?
nonlinear because the residual plot shows a pattern
What form of the relationship does this residual plot show?
nonlinear because the residual plot shows a pattern
What form of the relationship does this residual plot show?
linear because there is no apparent pattern seen in the residual plot
What is the form of this scatterplot?
nonlinear
What is the form of this scatterplot?
linear
Complete DUFS for this scatterplot.
The relationship appears negative, linear, moderately strong. No unusual features.
Complete DUFS for this scatterplot.
The relationship has no association.
Complete DUFS for this scatterplot.
The relationship appears nonlinear moderately strong. No unusual features.
Complete DUFS for this scatterplot.
The relationship appears linear, positive, moderately strong.
What symbol is used for correlation coefficient?
r
What symbol is used for coefficient of determination?
Interpret the correlation coefficient.
Direction, linear, strength with context
Interpret the coefficient of determination.
Interpret a residual.
The closer the correlation coefficient is to -1 or 1 the (blank) the relationship is.
stronger
r = 0
no correlation
