Tentukan Simpangan baku (standard deviasi) dati data 2,3,5,6,9

simpangan baku

2,3,5,6,9
jumlah data = 25
banyak data = 5
X rata rata = 5

s² = (2-5)² +(3-5)² +(5-5)² +(6-5)² +(9-5)² / (5)
s² = (9+4+0+1+16) /(5)
s² = 30/5 = 6
simpangan baku = s = √6