Does ice cream cause drownings? Let's think about this statistically. Consider that, in any given city, daily sales of ice cream are, most likely, positively correlated with daily rates of drownings.

A changeable independent variable is defined as one that assumes more than one level during an experimental trial or production run. When the values assumed by the variable are plotted against time, ...

This is a preview. Log in through your library . Abstract The following text appeared originally in slightly modified form0 as the editorial presentation to accompany the set of articles published in ...