# Question on statistics

I have a kind of weird question. But this wont be a harder one.

Actually, i feel it is incomplete. I don't have much experience on statistics. But some advance user will be able to understand this (may be guess the incomplete parts). I'll post all the information i have. Please try to give an answer to this.

This is about a set of calls..

Number of calls taken, $N = 1000$

Mean value, $\mu = 240$

Standard deviation, ${\sigma} = 50$ (Can this be in seconds???)

Given above details, the question is something like "What is the ***" of 1% of all are shorter: And the answer is 124s

Can someone please help me with this. Please explain what can be the question and show me how to solve it. I have some some knowledge on statistics and normal distribution..

Any help is greatly appreciated...

Thank you!

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As a well appreciated manner in these Q&A-sites: would you please mind to add some more info about the problem in the title of your question? – Gottfried Helms Aug 1 '12 at 11:21