standard-deviation

What’s the difference between sx and σx in the statistics calculations on a TI-Nspire?

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After cross-checking in Excel and reading Bessel’s correction and Unbiased estimation of standard deviation on Wikipedia … σx gives the “regular” standard deviation and sx applies Bessel’s correction. In other words, σx is the exact standard deviation of the data given (with n in the denominator), and sx is an unbiased estimation of the standard deviation of a larger population assuming that the data given is only a … Read more

Calculating Standard Deviation & Variance in C++

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As the other answer by horseshoe correctly suggests, you will have to use a loop to calculate variance otherwise the statement var = ((Array[n] – mean) * (Array[n] – mean)) / numPoints; will just consider a single element from the array. Just improved horseshoe’s suggested code: Your sum works fine even without using loop because … Read more