
Advanced Statistics Advanced Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
April 7th, 2007, 03:05 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)? 

Tags 
critical, find, ftest, hyp, null, test 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
First Deriv test, finding critical numbers of this.Need help  steelcurtain11  Calculus  2  November 1st, 2011 06:51 PM 
Critical Numbers / Absolute Extremas / First Derivative Test  RMG46  Calculus  1  October 24th, 2011 10:00 AM 
Test Statistic for Paired Sample Test  semifold  Advanced Statistics  0  January 23rd, 2010 02:17 PM 
Use a critical value to test H0 versus Ha  Charlotte  Advanced Statistics  1  October 10th, 2008 08:10 PM 
Null Hypothesis and Test of Significance  symmetry  Advanced Statistics  0  April 1st, 2007 05:42 AM 