Transforming data into deviations from the mean via standard deviations provides an objective yardstick to search for outliers. Read more.

New polling by Pew indicates that the U.S. is a global outlier when it comes to majority attitudes toward social media.

Identifying outliers in a data set is conceptually cut and dry. Running the Grubbs test on the opposite extreme return - a near 49% loss - also finds no support for labeling the number an outlier ...