Find the standard deviation of numbers 1 6 and 8 A 294 B 361

Find the standard deviation of numbers 1, 6, and 8.

A. 2.94
B. 3.61
C. 4.04
D. 5.00
E. 5.57
F. 8.67
G. 13.03

Solution

Note that  
  
Xbar = Sum(x) / n =    5
  
As  
  
s = sqrt [Sum(x - Xbar)^2 / (n - 1)]  
  
Then  
  
s =    3.605551275 or 3.61 [OPTION B, ANSWER]