• Support PF! Buy your school textbooks, materials and every day products Here!

Percentage error

  • Thread starter Kandy
  • Start date
  • #1
27
0
I forgot how to do percentage error, actually I kind of forgot what it is. I do remember multiplying somthg by 100% but i cant remember what i divide b4 that.
 

Answers and Replies

  • #2
159
0
In terms of percent error with regards to an accepted value:
Suppose you measured the atomic molar mass of lithium to be 8 g/mol. The accepted value is 6.94. You take the difference, which is 1.06g/mol, and the percent error is therefore +15.27% ie. 1.06/6.94 * 100%
 
  • #3
HallsofIvy
Science Advisor
Homework Helper
41,770
911
Theoretically, you divide the error by the true value. In practice, you have an error because you don't know the true value! In that case you divide the (estimated error) by the measured value.
 

Related Threads for: Percentage error

Replies
1
Views
33K
  • Last Post
Replies
13
Views
2K
  • Last Post
Replies
5
Views
4K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
7
Views
10K
Replies
2
Views
1K
Replies
28
Views
4K
Replies
6
Views
433
Top