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April 7th, 2007, 04:05 AM  #1 
Senior Member Joined: Dec 2006 From: New Jersey Posts: 378 Thanks: 1  Find critical value, Ftest value and Test Null Hyp.
Customer waiting times are studied at the Jefferson Valley Bank. When 25 randomly selected customers enter any one of several waiting lines, their times have a mean of 6.896 minutes and a standard deviation of 3.619 minutes. When 20 randomly selected customers enter a single main waiting line that feeds the individual teller stations, their waiting times have a mean of 7.460 minutes and a standard deviation of 1.841 minutes. Use a 0.05 significance level to test the claim that waiting times for the single line have a lower standard deviation. What are the critical value and F test value, each to 3 decimal places of precision? Do you reject the null hypothesis (Yes or No)? 

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critical, find, ftest, hyp, null, test 
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