Business Statistics! Standard Deviation and Probabilities?

Nick

New member
Hi all,

The transportation manager for the State of New Jersey has determined that the time between arrivals at a toll booth on the state's turnpike is exponentially distributed with ?=4 cars per minute. Based on this, the average time between arrivals is:

Not looking for you to give me the answers, just a little help. Anything would help :)

The standard deviation for the time between arrivals is:
What is the probability that the time between any two cars arriving will exceed 11 seconds?
1 hour ago - 4 days left to answer.
Additional Details
Thanks for the quick response Al!

The equation to the link that you sent me didn't make too much sense to me. Could you give me a couple more nudges?

Thanks!
33 minutes ago

Thanks for the quick response Al!

The equation to the link that you sent me didn't make too much sense to me. Could you give me a couple more nudges?

Thanks!
 
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