The Time Between Arrivals at an ATM Machine Follows an Exponential

question 14

Multiple Choice

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

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

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