Exercise
Outliers and Their Impact on Best Fit Lines
Examine how unusual data points affect lines of best fit. Learn to identify outliers and analyze their influence on linear models.
Questions
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MultiChoice
What is an outlier in a scatter plot?
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MultiChoice
How does a single extreme outlier usually affect the line of best fit?
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MultiChoice
If an outlier far above the rest of the data is removed, what usually happens to the slope of a positive trend line?
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MultiChoice
In a scatter plot showing study hours vs test scores, one student studied 10 hours but scored 15%. This point is an example of:
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MultiChoice
What should a researcher do before deciding to remove an outlier from data?
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MultiChoice
Removing a low outlier located at the right end of a scatter plot will likely cause the line's slope to:
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MultiChoice
If data points cluster tightly around y = 2x + 1 except for point (5, 30), point (5, 30) is:
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MultiChoice
Does an outlier always mean the data collection was done incorrectly?
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MultiChoice
Which statistic is LEAST affected by an extreme outlier?
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MultiChoice
An outlier located far away horizontally on the x-axis is often referred to as a point of high:
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MultiChoice
How can you visually identify an outlier on a scatter plot?
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MultiChoice
When fitting a line to data with a known bad data entry outlier, removing that outlier results in: