ANOVA will tell you whether there is a statistically significant difference in the population means of three or more groups of data. But which means are different? Tukey’s will tell you that. Analysis ...

An optical illusion challenges viewers to find the unique house among seemingly identical ones within a 9-second time limit. The puzzle tests observation skills and the ability to ignore distractions, ...

A new test developed by scientists at Northwestern University could make a big difference in the fight against hepatitis C.

Spot the Difference puzzles are the ultimate test of observation and speed! Two nearly identical images sit side by side, and ...