Medium
Math and Logic
Standard deviation of {1, 2, 3, 4, 5}?
Choose an answer
A.1.0
B.2.0
C.2.5
D.1.414 (2?)
Answer: 1.414 (2?)
The mean is 3. Squares of deviations: (1-3)^2=4, (2-3)^2=1, (3-3)^2=0, (4-3)^2=1, (5-3)^2=4. Average is 10/5 = 2. SD is sqrt(2) ? 1.414.