Lemma
MediumContinuous distributions
OpenStax, Introductory Statistics 2e §5.3 The Exponential Distribution · Exercise 31 · Probability · Continuous distributions

The Exponential Distribution · Exercise 31

The cost of all maintenance for a car during its first year is approximately exponentially distributed with a mean of $150.

(a) Define the random variable. X = _________________________________.
(b) X ~ = ________
(c) μ = ________
(d) σ = ________
(e) Draw a graph of the probability distribution. Label the axes.
(f) Find the probability that a car required over $300 for maintenance during its first year.

Its source prints no answer for this problem, so there's nothing to check against.

~8 minWritten answer · compare with the solution

OpenStax, Introductory Statistics 2e · §5.3 The Exponential Distribution · Exercise 31

Stuck? A gentle nudge

No hints for this one.

Something off?
Workspace
Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.