Multiple Choice
Which term refers to a pictorial representation of a given set of data involving variables?
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11. Correlation
Scatterplots & Intro to Correlation
Multiple Choice
Which of the following scatterplots best illustrates an outlier in the -direction?
A
A scatterplot where one point is far to the right of the others horizontally, but at the same vertical level.
B
A scatterplot where most points follow a linear trend, but one point is far above the others vertically.
C
A scatterplot where all points are evenly spread along a straight line.
D
A scatterplot where all points are clustered tightly in the center.
Verified step by step guidance1
Understand what an outlier in the y-direction means: it is a data point whose y-value (vertical position) is significantly different from the other points, while its x-value (horizontal position) may be similar or within the range of other points.
Review each scatterplot description and identify the position of the unusual point relative to the others:
For the first option, a point far to the right horizontally but at the same vertical level means the outlier is in the x-direction, not the y-direction.
For the second option, a point far above the others vertically while most points follow a linear trend indicates an outlier in the y-direction.
The third and fourth options describe points that are either evenly spread along a line or tightly clustered, which do not represent outliers in the y-direction.
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