Accuracy_versus_Precision__2_.ppt

# Accuracy_versus_Precision__2_.ppt - Accuracy and Precision...

• Homework Help
• 21

This preview shows page 1 - 8 out of 21 pages.

Accuracy and and Precision Precision Understanding measurements

Subscribe to view the full document.

Some mathematical STATEMENTS are 100% true (ex: I have 2 sisters, you are 14 years, 7 months, and 6 days old, etc.) But … every MEASUREMENT encounters ERROR. Understanding Error
Examples of Measurement Error Vibrations, drafts, changes in temperature, electronic noise etc. Limitations of the measuring instrument

Subscribe to view the full document.

Accuracy When dealing with data collection, we must describe the accuracy of the measurements
Accuracy Is Correctness! how close your measurement is to the accepted value. A highly accurate measurement will be very close to the accepted value.

Subscribe to view the full document.

Error ERROR is In correctness! The size of the experimental error can be described using mathematics: Absolute Error (or AE for short) shows how far away the measurement is from the accepted value Relative Error (or RE for short) turns the size of the error into a percentage .
Formulas Absolute Error = | Accepted Value – Measured Value | Relative Error = | Absolute Error | x 100 Accepted Value

Subscribe to view the full document.

• Spring '17
• mrs. Hornnibrook
• Physics, pH, 6 days, 4 pounds, 6 pounds, 7 months, •Accuracy

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern