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What is First Difference/Midpoint Graph & Sinusoidal Regression about?

This graph shows the difference between two data points on the y-axis plotted against their midpoint on the x-axis. It appears to show a sinusoidal pattern in the differences as the midpoints increase. A sinusoidal regression could be performed to determine if the differences systematically vary with the midpoints in a sinusoidal fashion.

Author

Dana White

Language

EN