We have the following:
If we look closely, there is a data set that is the same, but they add 1 to each number in the data set, it looks like this
[tex]\lbrace3+1,2+1,5+1,6+1,8+1\rbrace=\lbrace4,3,6,7,9\rbrace[/tex]
these data will have the same standard deviation, since the increase was equal in each data (+1)
Which means that the answer is the last option
