
Probability and Statistics Basic Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
March 15th, 2016, 02:55 PM  #1 
Senior Member Joined: Sep 2012 Posts: 201 Thanks: 1  experimental errors
Okay here is my question. The other day in labs me and my lab partner did an experiment with thermocouples, the basic ice is 0V and bolling water and measure the voltage as temp decreased. Now we have be asked to workout the error now he has used standard deviation but to me this cannot be right. My reason are as follows: Because we are not measuring the same thing repeatly we cannot take an average. Normal SD is used for repeated work like say measuring a block of wood from 10 different point to get in mean width. Also there are technically two error that we have to account for. One the volt meter the other the thermometer. I recent read of a way of doing it in a error analysis book. which was assume either one was negligible and assume the one with error have the same uncertainty I.+/0.2. Which from the way I read seem completely valid. I cant remember the formula off top off my head I am very new to stats. It was basically linear regression or as the book put it least square value and then you work out the uncertainness on A and B. Now is there away to combine the uncertainness and make it just one uncertainty like Y(equiv)=x? any help on the matter would be much appreciated; many thanks in advance. 

Tags 
errors, experimental 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
ONE OF MANY ERRORS IN CALCULUS2  mishin05  Calculus  1  December 18th, 2012 03:27 PM 
ONE OF MANY ERRORS IN CALCULUS3  mishin05  Calculus  1  December 18th, 2012 01:27 PM 
How to evaluate an uncertainty involving an experimental cor  Helena17  Physics  0  August 31st, 2012 03:05 PM 
Compare experimental results  aris  Algebra  0  October 27th, 2011 03:23 PM 