Understand and use the probability density function, f(x) = λe^(−λx) for x ≥ 0, of the exponential random variable with parameter λ > 0.

u4-t2-s1-d4

Interactive

Exponential probability density

manipulative

Vary λ in f(x)=λe^(−λx), shade P(a≤X≤b) as area, track the mean 1/λ, and pan/zoom the density.

Open fullscreen →

Want a different take?

Already have one and want another angle on this point? Describe what students should notice. Requests are read and acted on.