ΣX = 25 + ...... + 2118 = 18455
ΣX2= 252 + ...... + 21182 = 24998649
1. σ=√[ΣX2-(ΣX)2/N ]/N ] = √[249986429-184552/16]16 = 481.66
2. CV = σ/μ = 481.66/1153.4375 = 0.4176
3.Q1 : N/4 = 16/4 = 4 → Q1= X(4)+X(5)/2 = 761+853 / 2 = 807
Q3 : 3N/4 = 48/4 = 12 → Q3= X(12)+X(13)/2 = 1428+1520 / 2 = 1474
IQR=Q3-Q1=1474-807=667