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The Bob
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Changes to Standard Deviation??
How many of you know that Standard Deviation has changed.
It used to be:[tex]\sqrt{\frac{\Sigma(x_i - \overline{x})^2}{n}}[/tex]
And now it is:[tex]\sqrt{\frac{\Sigma(x_i - \overline{x})^2}{n - 1}}[/tex]
It is the Variance of data but square rooted:
[tex]s^2 = \frac{\Sigma(x_i - \overline{x})^2}{n - 1}[/tex] convertd to: [tex]s = \sqrt{\frac{\Sigma(x_i - \overline{x})^2}{n - 1}}[/tex]
Not really anything important, just wanted people to know and comment (if necessary) on the fact that it has changed.
The Bob (2004 ©)
How many of you know that Standard Deviation has changed.
It used to be:[tex]\sqrt{\frac{\Sigma(x_i - \overline{x})^2}{n}}[/tex]
And now it is:[tex]\sqrt{\frac{\Sigma(x_i - \overline{x})^2}{n - 1}}[/tex]
It is the Variance of data but square rooted:
[tex]s^2 = \frac{\Sigma(x_i - \overline{x})^2}{n - 1}[/tex] convertd to: [tex]s = \sqrt{\frac{\Sigma(x_i - \overline{x})^2}{n - 1}}[/tex]
Not really anything important, just wanted people to know and comment (if necessary) on the fact that it has changed.
The Bob (2004 ©)
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