Interactive probability visualisation

Bivariate Gaussian

Move the mean, change the spread, and rotate the correlation. The axes stay fixed so the distribution visibly moves through the coordinate plane.

Designed for classroom projection
Fixed axes: x,y ∈ [−4, 8]
Marginal fX(x)
Correlation
ρ = 0.30
Moderate positive correlation: high X tends to occur with high Y.
μX
2.00
μY
2.00
Joint density fX,Y(x,y)
Drag to rotate • wheel to zoom
peak
0
Marginal fY(y)