<PRE><B>Question 713399</B>
Assume that the mean and the standard deviation of a dataset are 45 and 6, respectively. Without assuming anything about the distribution of the data, at least what percentage of the values is between 33 and 57? 
-------
(57-45)/6 = 12/6 = 2
(45-33)/6 = 12/6 = 2
------------
Those values frame 2 standard deviations of data around the mean.
----
According to Chebychev at least 75% of the data is between
those 2 values.
-------
Cheers,
Stan H.
===========</PRE>