How Do You Calculate Percent Disagreement?

  • Thread starter Thread starter rachelle
  • Start date Start date
  • Tags Tags
    Percent
Click For Summary
SUMMARY

The discussion focuses on calculating the "percent disagreement" in a physics lab context. The user initially miscalculates the formula, suggesting a percent disagreement of 32% based on incorrect arithmetic. The correct approach involves computing the relative error using the formula: (|expected value - calculated value| / expected value) * 100. The accurate calculation confirms that the user ultimately understands the correct method for determining percent disagreement.

PREREQUISITES
  • Understanding of relative error calculation
  • Familiarity with basic arithmetic operations
  • Knowledge of physics lab reporting standards
  • Ability to interpret expected vs. calculated values
NEXT STEPS
  • Study the concept of relative error in scientific measurements
  • Learn how to report uncertainty in experimental results
  • Explore statistical methods for analyzing experimental data
  • Review guidelines for writing physics lab reports
USEFUL FOR

Students in physics courses, educators teaching lab methodologies, and anyone involved in scientific experimentation and data analysis.

rachelle
Messages
18
Reaction score
0
Ok, I'm doing my Physics lab and I was told to give a "percent disagreement" if any.. I know it's a very simple question, but I want to make sure if I understood it right...

So say I get an expected value to be .541 and when I calculated it, the answer is .715... so is the "percent disagreement" to be 32%? (.541 + .715/.541)

Can someone verify if this is correct... thanks in advance :smile:
 
Physics news on Phys.org
Eeh?
Whatever have you written here??
You are to compute the relative error!
(finding the percent from that is easy, just shift the decinal point two places in the correct direction)
 
Whoops, I got the correct answer but I meant .541 - .715/.541
and my true value was actually .541
Anyway, I got it, thanks
 

Similar threads

Uncertainty Error and Significant Figures in this Force Tables Lab
  • · Replies 4 ·
Replies
4
Views
3K
How do I calculate percent elasticity?
  • · Replies 5 ·
Replies
5
Views
7K
Percent Uncertainty Shenanigans
  • · Replies 4 ·
Replies
4
Views
2K
Spectrophotometric Determination of Fe2+ (Beer's Law)
  • · Replies 1 ·
Replies
1
Views
2K
Calculating percent error in a lab
  • · Replies 1 ·
Replies
1
Views
5K
High School Sig figs/certainty in percent error calculation
  • · Replies 8 ·
Replies
8
Views
6K
Change In Gravitational Energy Percent Error
  • · Replies 10 ·
Replies
10
Views
4K
How Do You Calculate Uncertainty in Acceleration from Photogate Timer Data?
  • · Replies 3 ·
Replies
3
Views
10K
Calculate Percent Error: Measuring 75cm with Meter Stick
  • · Replies 5 ·
Replies
5
Views
5K
High School How do you multiply percents on paper
  • · Replies 4 ·
Replies
4
Views
2K