
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
 LinkBack  Thread Tools  Display Modes 
June 21st, 2009, 11:36 PM  #1 
Newbie Joined: Jun 2009 Posts: 1 Thanks: 0  inverse proportion
hi, in information retrieval course , I had question that I do not understand, it is related to math so hope you can help me question : Which factors of the following inversely proportion to the precision measures? a) not retrieved and relevant + retrieved and not relevant b) retrieved and relevant +not retrieved and not relevant c) retrieved and relevant + retrieved and not relevant the answer is c (Note :i am not sure if + means addition or and ) instructor said you can know the answer by the equation of precision precision= number of relevant document retrieved/total number of document retrieved can any one explain it to me . I hope this is right section to ask this question , i am sorry if it is not Thank you 
June 24th, 2009, 10:49 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 18,841 Thanks: 1564 
The question doesn't make sense, and neither does the instructor's answer! Choices (a) and (b) are nohopers. Regarding choice (c), (retrieved and not relevant)/(retrieved and relevant) = (total retrieved  (retrieved and relevant))/(retrieved and relevant) = 1/precision  1, but I don't think it's reasonable to refer to 1/precision as a factor of 1/precision  1. 

Tags 
inverse, proportion 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Ratio and Proportion I  sachinrajsharma  Algebra  1  March 18th, 2013 09:35 PM 
Inverse Proportion Problem  watkd  Algebra  3  August 11th, 2012 01:18 PM 
continued proportion  empiricus  Algebra  8  September 20th, 2011 11:40 AM 
Proportion  haftakhan  Algebra  2  July 5th, 2010 01:49 PM 
What proportion  Mahonroy  Advanced Statistics  2  September 8th, 2009 08:39 AM 