Option 2
<u>ANSWER: </u>
The Standard deviation of (7, 9, 10, 11, 13) is 2.
<u>SOLUTION:
</u>
Given, data set is (7, 9, 10, 11, 13)
Standard deviation
Where, is element of data set
is mean of data set
n is total number observations.
Now, mean
= 10
So, the mean of data set is 10.
Now, standard deviation
So, the standard deviation is 2.
Hence, the second option is right, i.e. standard deviation is 2.