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Measurements, Accuracy, & Precision - Coggle Diagram

- - - - SI units
        
        universally accepted
        
        7 base units
        (kg, m, s, K, mol, A, cd)
        
        derived units like speed
        (m/s)
        can be used during dimensional analysis
        
        conversion factors
        
        ratios set up to 'cancel' unwanted units
      - METRIC PREFIXES
        
        signifies larger or smaller magnitude of base unit
        
        larger = mega, kilo
        smaller = deci, centi, milli, micro, nano, pico
    - - impact
    - - impact
- - - - percent error equation
        
        (experimental value - true value) / true value
        
        multiply by 100 to be written as percent
- - - - Standard Deviation formula
        
        although a better way to measure precision is through...
        
        Percent Relative Standard Deviation
        (%RSD)
        st dev divided by the average value x 100%
      - R-squared value
        
        does the data fit the linear equation?