suppose the data has variance 16 , what does this logically means ?(Doh)

Printable View

- March 12th 2009, 03:48 AMkashif shahvariance
suppose the data has variance 16 , what does this logically means ?(Doh)

- March 12th 2009, 12:19 PMdeltahunter
That would mean that most data points vary about 16 away from the mean. So if you were plotting test scores, and the mean was 78, then a variance of 16 would mean that most points would vary from 62 to 94. Also standard deviation is the square root of the variance, which would be 4.

- March 12th 2009, 05:52 PMmr fantastic
- March 18th 2009, 07:43 AMkashif shahvariance
what is logical interpretion of variance ?

i.e. if a data has variance 36 , what does it mean logicaly ?

also the same data has standard deviation 6 , to me it makes sense that spread about mean of the data is about 6 , how can we think about variance 36 for the same data ?