Question

Standard deviation of three numbers 9, 10, 11 is
1
(A)
(B)
WIN
(e)
V
(D) V2​

Answer 1

Answer:

Step-by-step explanation:

Standard deviation of (9,10,11) is √(2/3)

Stdev =√( ∑(x-mean)^2 / n)

mean = ∑x/n = (9+10+11) / 3 = 30/3=10

Stdev = √(((9-10)^2 + (10-10)^2 + (11-10)2 )/3) = √((1^2 + 0^2 + 1^2)/3) =√(2/3)