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OpenStudy (anonymous):
Find the sample variance and standard deviation. 20, 10, 5, 8, 9
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OpenStudy (australopithecus):
OpenStudy (australopithecus):
where the x with the line above it is the mean, and x is just a data point and n is your sample size
OpenStudy (australopithecus):
Which means you have to follow this formula for every data point and sum them all together
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