1. Exponential Probabilities
Find the probability P(x ≤ x0), where x is an exponentially distributed random variable
Click Insert Function (fx)
Select Statistical as your function category
Choose EXPON.DIST 1 2

2. Exponential Probabilities
You must enter X = The value of the exponential distribution for which you would like the cumulative probability P(x ≤ X).
Lambda = 1/The mean of the exponential distribution.
Cumulative = True if you want P(x ≤ X).
= False if you want the height of the curve at x. Use
if you would like to graph the
function (not used much in this class).

3. Exponential Probabilities
Example: A certain manufacturer's bicycle pedal sealed-bearing set's lifetime is exponentially distributed with a mean of 5 years. What is the probability that a sealed-bearing set lasts less than 5 years?
You must enter X = 5, since you want P(x < 5).
Lambda = 1/5 = 0.2.
Cumulative = True since you want P(x < 5).
Answer: P(x < 5) =