Mind map

Errors in Measurements

showxuanlau English

Map content

Types of Errors
- Systematic Error
  - Affect accuracy
  - Sources of errors
    - Instrument not calibrated
    - Faulty apparatus (zero error)
    - Procedure/method incorrect
    - Predictable
  - Methods to identify/ eliiminate this ?
    - Calibrating equipment for zero error
    - Improving experimental design
    - Repeating experiment using different instruments
- Random Error
  - Affect precision
  - Sources of Errors
    - Fluctuation reading (e.g: Burette/pipette)
    - Small sample size/trials
    - Statistical fluctuation of measurement
    - Unpredictable
    - Parallax error
  - Ways to reduce/ prevent this ?
    - increase number of reading
    - Increase sample size/ trials
    - Using statistical mean
Characteristic of Measurement
- Accuracy
  - Measurement value close to correct value
- Precision
  - Measurement value close to each other
Impact of errors in experimental results
- Experimental bias
- Affect analysis and results interpretation

Description: Mind Map on Errors in Measurements, created by showxuanlau on 20/09/2014.
Created by: showxuanlau
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