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Math Help - variance

  1. #1
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    Post variance

    suppose the data has variance 16 , what does this logically means ?
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  2. #2
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    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.
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  3. #3
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    Quote Originally Posted by kashif shah View Post
    suppose the data has variance 16 , what does this logically means ?
    Variance - Wikipedia, the free encyclopedia
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  4. #4
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    variance

    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 ?
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