Shawna N.

asked • 03/06/16

Probability Statistics

If I have Mean 7.75
What is the standard deviation of the time? (Do not round your intermediate calculations. Round your answer to 2 decimal places.)

 

1 Expert Answer

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Tim M. answered • 03/06/16

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Statistics and Social/Biological Sciences

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Hi Shawna,
 
It looks like you're missing some information. If we only know the mean, we can't calculate the standard deviation. Does the question tell you anything else?
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Shawna N.

Customers experiencing technical difficulty with their internet cable hookup may call an 800 number for technical support. It takes the technician between 90 seconds and 14 minutes to resolve the problem. The distribution of this support time follows the uniform distribution.


a.

What are the values for a and b in minutes? (Do not round your intermediate calculations. Round your answers to 1 decimal place.)



a
b


b-1.

What is the mean time to resolve the problem? (Do not round your intermediate calculations. Round your answer to 2 decimal places.)


Mean


b-2.

What is the standard deviation of the time? (Do not round your intermediate calculations. Round your answer to 2 decimal places.)
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03/06/16

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