It is sometimes useful to "jitter" data when viewing a scatterplot involving dummy variables. To jitter data we
A) Add a small random number to both the independent and dependent variable before running the regression.
B) Add a small random number to both the independent and dependent variable to the plotted data.
C) Add a small random number to both the independent and dependent variable before running the regression and to the plotted data.
D) None of the above.

Question

Quizplus · Accepted Answer

Jittering data involves adding a small random amount of noise to the data to help distinguish overlapping points in scatterplots. This can be done by adding a small random number to both the independent and dependent variables in the plotted data. Adding noise to the regression model itself (option A or C) is not necessary for jittering data.

It Is Sometimes Useful to "Jitter" Data When Viewing a Scatterplot