Guess the Standard Deviation

You'll see 10 histograms. Guess the standard deviation of each one within 5 seconds. Lower score = better!
How to play

Leaderboard (Top 20)

#PlayerScoreDate
1 Thomas 0.1905 2026-03-16
2 Henri 0.2159 2026-03-16
3 Thomas 0.2700 2026-03-16
4 Henri 0.3291 2026-03-16
5 Nathan 0.3447 2026-03-16
6 Andrew 0.8247 2026-03-16
7 hello 1.4155 2026-03-16