SNR / Standard deviation

Discussion in 'Homework Help' started by vultac, Apr 30, 2009.

  1. vultac

    Thread Starter Active Member

    Mar 2, 2009
    142
    0
    Hi there, I have attached a graph and would like to ask how do I calculate the Signal to noise ratio as well as the standard deviation from these graphs thx
     
  2. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
    864
    40
    You forgot the graph.
     
  3. vultac

    Thread Starter Active Member

    Mar 2, 2009
    142
    0
    ops sry haha
     
  4. Papabravo

    Expert

    Feb 24, 2006
    10,163
    1,796
    To compute the standard deviation
    1. Compute the mean(average)
    2. Tabulate the deviations between the samples and the mean
    3. Square the deviations
    4. Divide by the number of samples to get the average squared deviation.
    5. Take the square root of the average squared deviation
    This would be the population standard deviation. There is a very small correction if you use a sample to estimate the sd of a population.
     
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