
Advanced Statistics Advanced Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
September 23rd, 2007, 05:54 PM  #1 
Newbie Joined: Sep 2007 Posts: 1 Thanks: 0  Statistics
Pediatric data reveal the average child is toilet trained at 26 months, but that there is a 2 month standard deviation from this norm. What percentage of children are toilet trained by 23 months ? 
September 24th, 2007, 07:30 PM  #2 
Member Joined: Mar 2007 Posts: 57 Thanks: 0 
Assuming a normal distribution, you want Pr{ Z < (23  26)/2 } where Z~N(0,1) 

Tags 
statistics 
Search tags for this page 
pediatric data reveal that the average child is toilet trained at 26 months,pedriATric data reveal that the average child is toilet trained
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Statistics  gaussrelatz  Probability and Statistics  4  January 25th, 2013 04:55 AM 
best introduction to statistics book? not applied statistics  ElMarsh  Advanced Statistics  2  October 23rd, 2009 06:10 PM 
statistics help  kage  Probability and Statistics  1  February 15th, 2009 02:51 AM 
statistics  sandeep641  Probability and Statistics  0  February 8th, 2009 10:00 AM 
statistics  mwe  Probability and Statistics  0  January 12th, 2009 06:31 AM 