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What is the standard deviation for 5,5,5,6,6,6,6,7,7?
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4 votes
What is the standard deviation for 5,5,5,6,6,6,6,7,7?

User Fraser Crosbie
by
4.4k points

1 Answer

3 votes

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

User Kaolin Fire
by
4.2k points
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