Answer: 0.74
Explanation:
Standard Deviation, σ: 0.73702773119009
Count, N: 9
Sum, Σx: 53
Mean, μ: 5.8888888888889
Variance, σ2: 0.54320987654321
Steps:
σ2 =
Σ(xi - μ)2
N
=
(5 - 5.8888888888889)2 + ... + (7 - 5.8888888888889)2
9
=
4.8888888888889
9
= 0.54320987654321
σ = √0.54320987654321
= 0.73702773119009