Answer: σ: 2.76
Step-by-step explanation:
Count, N: 5
Sum, Σx: 125
Mean, μ: 25
Variance, σ2: 7.6
Steps
look at attached pic for formula
σ^2 = [tex]\frac{Σ(xi - μ)^{2} }{N}[/tex]
[tex]\frac{(21 - 25)2 + ... + (29 - 25)2}{5}[/tex]
⇒ [tex]\frac{38}{5}[/tex]
⇒ 7.6
σ = [tex]\sqrt{7.6}[/tex]
⇒ 2.756809750418
⇒ or 2.76
