Follow your curiosity

What discovery has been shared with you?

FACTREE gives you something interesting to discover every day — and something worth talking about together.

Start with one fact. Explore it, go deeper, then follow whichever branch catches your imagination.

Choose subjects for a surprise

Exploring any topic

Begin your discovery

Your next discovery is one click away.

Choose one or more subjects above, or leave Any Topic selected and let curiosity decide.

Mathematics

Analysis of Variance (ANOVA)

Quick fact

ANOVA was developed by Ronald Fisher in the 1920s to analyze agricultural experiments, and its name is a bit misleading—it compares means, not variances, by analyzing variance.

Why this is interesting

You want to know if three different fertilizers lead to different crop yields. Why can't you just run multiple t-tests? Because the chance of a false positive skyrockets.