yakni
58/8
Pembahasan:
x︦ = 1 + 1 + 2 + 3 + 4 + 5 + 7 + 9
8
= 32
8
= 4
S² = Σ(x︦ – xi)²
Σfi
= (4–1)² + (4–1)² + (4–2)² + (4–3)² + (4–4)² + (4–5)² + (4–7)² + (4–9)² ÷ 8
= 9 + 9 + 4 + 1 + 0 + 1 + 9 + 25
8
= 58
8