Hitung standar deviasi (SD) data : 2,3,5,6,9.

jawab

xi = 2,3,5,6,9
n = 5
∑xi = 2+3+5+6+ 9 = 25
X =  25/5 = 5

SD = √ (2-5)² +(3-5)² +(5-5)²+(6-5)²+(9-5)² / (5)
SD  = √(9+4+0+1+16)/5 = √(30/5)
SD = √6