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Q: In a data plot most of the data points will lie below the line of best fit?

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False

Yes. The exception arises when you have outliers.

False (apex)

A scatter plot would be best for non-related data points. A line graph would be best for related data points.

Because the "best fit" line is usually required to be a straight line, but the data points are not all on one straight line. (If they were, then the best-fit line would be a real no-brainer.)

7

A straight line which best describes the data on a scatter plot is called a "line of best fit". The line could pass through some of the points, all of them, or none of them.

Data points that are not close to the line of best fit are called outliers.

a line of best fit

a line of best fit

a line of best fit

A best-fit line is the straight line which most accurately represents a set of data/points. It is defined as the line that is the smallest average distance from the data/points. Refer to the related links for an illustration of a best fit line.

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