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  • 12:19:08 pm on August 22, 2010 | # | 0
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    If we assume a normally distributed population with mean μ and standard deviation σ, and take sample

    x_{1}, x_{2},..., x_{n}\sim N(\mu,\sigma^{2})

    statistical error is then


    while residual is

    hat over the letter ε indicates an observable estimate of an unobservable quantity called ε.


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