One-Tailed vs Two-Tailed Tests (Does It Matter?)

There’s a lot of controversy around one-tailed vs two-tailed testing.

Articles like this lambast the shortcomings of one-tailed testing, saying that “unsophisticated users love them.” On the flip side, some articles and discussions take a more balanced approach and say there’s a time and a place for both.

In fact, many people don’t realize that there are two ways to determine whether an experiment’s results are statistically valid. There’s still a lot of confusion …read more

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