A scatterplot flickers into view and starts fading, estimate its correlation, set how wide a band you'll wager, and call it before it's gone.
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How to play
Each round you see a scatter of points and must judge its correlation (r) from roughly -1 to +1. Slide your guess to the center of a band, choose how tight that band is, stake some coins, and CALL before the plot fades. If the true r lands inside your band you win; tighter bands and closer centers pay more.
Eight plots per game, starting from a coin purse you grow or burn.
Tighter bands multiply the payout but are easier to miss.
Some plots are traps where outliers fake a trend the bulk of points don't show.
Controls
Desktop: drag the guess, band and wager sliders, then click CALL IT.
Phone & tablet: drag the sliders and tap CALL IT, fully touch-friendly.
Game modes
Daily: the same seeded plots for everyone.
Practice: a fresh randomized purse run.
Tips & strategy
Mentally ignore one or two extreme points to judge the real cloud's tilt.
Bet wide when the cloud is fuzzy and tight only when the line is obvious.
What you'll learn
Eyeball-r is a correlation-estimation game that sharpens your statistical intuition for scatterplots.
For parents & teachers: a feel for correlation by eye.
About Eyeball-r
Eyeball-r is a correlation-estimation betting game that sharpens your statistical intuition for scatterplots. It's an original free browser game built for PlayPendium.
A free, original browser game on PlayPendium. No download, no install.
