Question

Nomor 5 besok dikumpul PAKAI CARA

Answer 1

Mean kelas IXa = (4×4)+(5×5)+(6×12)+(7×10)+(8×6)+(9×1)+(10×2) per 40 =
16+25+72+70+48+9+20 per 40 = 260 per 40 = 6,5
mean kelas IX b =
(4×6)+(5×4)+(6×9)+(7×13)+(8×4)+(9×3)+(10×1) per 40 =
24+20+54+91+32+27+10 per 40 = 258 per 40 = 6,45
selisih rata rata = 6,5 - 6,45 = 0,05