The mean of the numbers 15, 21, 17, 26, 18, and 29 is 21....
The mean of the numbers 15, 21, 17, 26, 18, and 29 is 21. Calculate the standard deviation
9
6
5
0
Correct answer is C
|
x |
x - ¯x)2 | (x - ¯x)2 |
|
15 21 17 26 18 29 |
-6 0 -4 5 -3 -8 |
36 0 16 25 9 64 |
| ∑(x−¯x)2 = 150 |
Standard deviation = √∑(x−¯x)2n
= 1506
= √25
= 5