The Time Between Arrivals at an ATM Machine Follows an Exponential

question 30

Multiple Choice

The time between arrivals at an ATM machine follows an exponential distribution with θ = 10 minutes. Find the mean and standard deviation of this distribution.

• A)Mean = 10, Standard Deviation = 100
• B)Mean = 10, Standard Deviation = 3.16
• C)Mean = 10, Standard Deviation = 10
• D)Mean = 3.16, Standard Deviation = 3.16