standar deviasi 2,11,1,10,3,9

Rata" : (1+2+3+9+10+11) ÷ 6
= 36/6
= 6

SD : [√(1-5)²+(2-5)²+(3-5)²+(9-5)²+(10-5)²+(11-5)²] per 6
= (√25+16+9+9+16+25) per 6
= √100 per6
= √16,67
= 4√0,67
= 4√1

Maaf kalau salah