Not really sure how to do this so any help would be appreciated. :)
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It's a little bit of work. First you need to find the mean of the set, and then you have to subtract the mean from each data point and divide it all by the number of data points. To do this problem:
Mean = (12.5+12.7+14.0+11.3+11.7+10.9)/6 = 12.3
Variance = [(12.5-12.3)^2+(12.7-12.3)^2+(14.9-12.3)… = 1.675 = 1.7
(If this is a more advanced stats class, you need to use V(X)= E(X^2)+[E(X)^2].)
Mean = (12.5+12.7+14.0+11.3+11.7+10.9)/6 = 12.3
Variance = [(12.5-12.3)^2+(12.7-12.3)^2+(14.9-12.3)… = 1.675 = 1.7
(If this is a more advanced stats class, you need to use V(X)= E(X^2)+[E(X)^2].)
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