quartiles: Arrange the observations in increasing order and locate the median. The first quartile

quartiles:

1. 
   Arrange the observations in increasing order and locate the median.
   
2. 
   The first quartile Q₁ is the median of the observations located to the left of the median in the ordered list.
   
3. 
   The third quartile Q₃ is the median of the observations located to the right of the median in the ordered list.
   

• 
  Why is IQR better than range?
  
  • 
    The quartiles and the interquartile range are resistant because they are not affected by a few extreme observations.
    
    • 
      Ex: Q₃ would still be 42.5 and IQR would still be 27.5 if the maximum were 850 rather than 85.
      

• 
  Identifying Outliers
  
  • 
    In addition to serving as a measure of spread, the interquartile range (IQR) is used as part of a rule of thumb for identifying outliers.
    
  • 
    
    Directory: ourpages -> auto -> 2017
    2017 -> Senior Division Solutions
    2017 -> Avant garde adademy of broward
    2017 -> Have you always wanted to go to space camp? Dreamt of becoming an astronaut here’s your chance!
    2017 -> Atlanta, georgia-april 2017-a total solar eclipse occurs when the moon lines up between the earth and the sun-an extremely rare and beautiful event
    2017 -> United states history and geography unit 1: The Rise of Industrial America 1877-1914
    2017 -> Out-of-Field Notification to Parents/Guardians English
    2017 -> Modern History Notes 9-21-2017 Entertainment
    2017 -> The secret of change is to focus all of your energy, not on fighting the old, but on building the new
    2017 -> The Berlin Conference 1884 Simulation Historical Context
    2017 -> Island Biogeography and Biodiversity Part I: Background Reading
    
    
    
    Download 10.83 Mb.
    
    Share with your friends: