Jika berat badan rata - rata 47 kg, tentukan nilai p ! Diketahui Berat badan (kg) = 44,45,46,47,48,49,dan 50. Frekuensi = 4,3,6,6,2,p, dan 4

rata2 berat badan = 47 kg
berat badan = 44, 45, 46, 47, 48, 49, 50
frekuensi = 4, 3, 6, 6, 2, p, 4
rata2 = [tex]\frac{(44×4)+(45×3)+(46×6)+(47×6)+(48×2)+(49×p)+(50×4)}{4+3+6+6+2+p+4}[/tex]
47 = [tex]\frac{176+135+276+282+96+49p+200}{25+p}[/tex]
47(25 + p) = 1165 + 49p
1175 + 47p = 1165 + 49p
1175 - 1165 = 49p - 47p
10 = 2p
p = 10 : 2 = 5