Return-Path: william@bourbon.usc.edu Delivery-Date: Sun Sep 21 21:01:10 2008 X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on merlot.usc.edu X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=AWL,BAYES_00 autolearn=ham version=3.2.3 Received: from bourbon.usc.edu (bourbon.usc.edu [128.125.9.75]) by merlot.usc.edu (8.14.1/8.14.1) with ESMTP id m8M41AeT019147 for ; Sun, 21 Sep 2008 21:01:10 -0700 Received: from bourbon.usc.edu (localhost.localdomain [127.0.0.1]) by bourbon.usc.edu (8.14.2/8.14.1) with ESMTP id m8M43Rs5008345 for ; Sun, 21 Sep 2008 21:03:27 -0700 Message-Id: <200809220403.m8M43Rs5008345@bourbon.usc.edu> To: cs551@merlot.usc.edu Subject: Re: average service time Date: Sun, 21 Sep 2008 21:03:27 -0700 From: Bill Cheng Someone wrote: > If there are 3 customers and u press cntrl C after 2 customers arrived. > thats is we have 2 custtomers serviced and 3 arrived. > > should we divide by 3 or 2 ? If you are the bank manager and you are trying to find out what's the average time a customer spent at a teller, what would be the right thing to do? -- Bill Cheng // bill.cheng@usc.edu > Someone wrote: > > > Is Avg Service time = total serive time by S1/customers in > > s1 +total service time in S2/ customers in s2 > > > > or = (total service time by s1 + s2) / total customers arrived ? > > If there are 3 customers, customer 1's service time is > 2.5 seconds, customer 2's service time is 3.3 seconds, > customer 3's service time is 1.7 second, the average > service time is (2.5+3.3+1.7)/3. > -- > Bill Cheng // bill.cheng@usc.edu