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The Standard Deviation :: Standard Deviation Quiz
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If you have the variance, how do you get the standard deviation?
Subtract the mean
Take the reciprocal
Square it
Divide it by the sample size
Take the square root
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April 17, 2016  Yasser wrote:
set [4,10,12,2,15,5] mean = 48/6 = 8 variance = [(48)^2 + (108)^2 + (128)^2 + (28)^2 + (158)^2 + (58)^2] / n1 so variance = 130 / 5 = 26 std. dev = sqrt of variance so sqrt of 26 = 5.099
September 22, 2015  Noah Krause wrote:
I still don't get it
November 22, 2014  Kristen wrote:
I had a hard time understanding how you interpret the differences between samples Or at least understanding how to do so outside of the examples given.
May 8, 2009  JQ wrote:
On the questions at the end, when you ask us to calculate the standard deviation, you don't specify whether it is sample or population. If I am just given a small set of numbers, rather than told I have a sample drawn from a larger population, shouldn't I assume that that set is the complete set, and therefore use population SD?