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 involves adding a small amount of random noise to the data points to spread them out horizontally, making it easier to see patterns that might otherwise be obscured. Adding noise to the regression equation (A) would not help in visualizing the data, and adding noise to both the regression and plotted data (C) would be redundant and potentially misleading. Therefore, adding noise only to the plotted data (B) is the best option.

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