1 is your answer -+- is a positive
I used guess and check for this one, it would be 8 and 12, they both have a difference of 4 and a product of 96.
<span>The standard deviation can be zero if all the data points are the same. Thestandard deviation can be larger than the mean. The range of numbers has to be large for this to occur. One such sample is {0, 0, 1, 15, 20}, where = 7.2 and s 8.6.</span>