A scatterplot
A)shows how Y and X are related when their relationship is scattered all over the place.
B)relates the covariance of X and Y to the correlation coefficient.
C)is a plot of n observations on Xi and Yi,where each observation is represented by the point (Xi,Yi).
D)shows n observations of Y over time.

Question

Quizplus · Accepted Answer

A scatterplot is a visual representation of the relationship between two variables, usually X and Y. Each observation is represented by a point on the graph, with the X-value on the horizontal axis and the Y-value on the vertical axis. The scatterplot shows how the two variables are related, whether the relationship is strong or weak, positive or negative, or scattered all over the place. The covariance of X and Y and the correlation coefficient can be calculated from the scatterplot, but they do not relate in the same way as depicted in option B. Option D is completely unrelated to scatterplot.

A Scatterplot