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Mathematics 10 Online
OpenStudy (anonymous):

Find the variance and standard deviation. {3, 3, 4, 5, 5}

OpenStudy (zarkon):

you can actually do this one in your head :)

OpenStudy (zarkon):

you know th mean?

OpenStudy (zarkon):

*the

OpenStudy (anonymous):

the mean is 4

OpenStudy (zarkon):

good...what is the difference between each of the members of the data set is from 4

OpenStudy (zarkon):

man that was a bad sentence :)

OpenStudy (zarkon):

so take each elelment from your data set and subtract 4

OpenStudy (zarkon):

you should get 5 numbers

OpenStudy (zarkon):

square each of those numbers and add then together

OpenStudy (zarkon):

I'm assuming this is sample data so then divide by one less than the sample size...this will be the variance

OpenStudy (anonymous):

i got the varience at 0.8

OpenStudy (zarkon):

is this population data or sample data

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