



 
Reggie, The standard deviation measures the spread of the data so increasing the spread should increase the standard deviation. Here is a small example with easy numbers. (You should check my calculations.) Suppose you have 3 scores, 1, 2 and 3. The sample mean is 2 and the standard deviation is 1. Suppose now you notice that the smallest score should be 2. The data is now 2, 2 and 3. The mean is 1 and the standard deviation is √14. I hope this helps,  


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