[BiO BB] Mean and Standard deviation

[Subhash Agarwal]

Dear Forum Memebers
   
  I have a dataset with 394 data points. The frequecy distribution of which is as follows:
   
                0-0.02  85    0.02-0.04  63    0.04-0.06  51    0.06-0.08  39    0.08-0.1  36    0.10-0.12  24    -0.12-0.14  21    0.14-0.16  19    0.16-0.18  13    0.18-0.2  10            >0.20            33
   
  The mean and SD of the data is 0.0842 and 0.0853. But when the data points from 0-0.02 and > 0.2 are removed and the mean and SD is calculated it is found that mean doesnt change much (0.0819) but SD does (0.0472). My query is what can I interpret from this regarding the data.
   
  If any of the forum members feels that this question should be addressed to some other place do let me know.
   
  Thanks
  Subhash

				
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