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dtan5457
 one year ago
Can someone explain these standard deviation symbols?
dtan5457
 one year ago
Can someone explain these standard deviation symbols?

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geerky42
 one year ago
Best ResponseYou've already chosen the best response.0Well, \(\overline x\) means "sample mean"

geerky42
 one year ago
Best ResponseYou've already chosen the best response.0And standard derivative is sum of all \((x_i+\overline x)^2\) divide by how many \(x_i\) there are (there are 5 \(x_i\)'s in your table.)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The \(\bar x\) will be the same for every row.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The mean \(\bar x\) is just the average of the \(x_i\) column. The variance \(\sigma^2\) will be the average of the \((x_i  \bar x)^2\) column. The standard deviation \(\sigma\) is just the square root of variance \(\sigma ^2\). Since there are \(5\) rows, average is just summing the column and dividing by \(5\).

geerky42
 one year ago
Best ResponseYou've already chosen the best response.0Trust Wio lol. I just did quick google.
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