Answer: √8
Explanation:
Step 1: Find the mean.
(5+7+9+11+13)/5 --> 45/5 = 9
Step 2: Find each score's deviation from the mean.
5-9= -4
7-9= -2
9-9= 0
11-9= 2
13-9= 4
Step 3: Square each deviation from the mean.
-4^2 = 16
-2^2= 4
0^2 = 0
2^2 = 4
4^4 = 16
Step 4: Find the sum of squares.
16+4+0+4+16 = 40
Step 5: Find the variance.
40/5 = 8
Step 6: Find the square root of the variance.
the square root of 8 is √8