tolong bantu jawab no 5 yaaa

urutan data
berat 37 = 3 siswa
berat 38 = 6 siswa
berat 39 = 3 siswa
berat 40 = 4 siswa

5a) modus = 38 kg

median = ( nilai ke 8 + ke 9 ) ÷ 2
= ( 38 + 38 ) ÷ 2
= 38 kg

rata² = ( 3 × 37 ) + ( 6 × 38 ) + ( 3 × 39 ) + ( 4 × 40 ) / ( 3 + 6 + 3 + 4 )
= ( 111 + 228 + 117 + 160 ) / 16
= 616 / 16
= 38,5 kg


b) misal rata² berat badan 4 siswa = a
38 = ( 16 × 38,5 ) + ( 4 × a ) / ( 16 + 4 )
38 = 616 + 4a / 20
38 × 20 = 616 + 4a
760 = 616 + 4a
4a = 760 - 616
4a = 144
a = 36
jadi rata² berat badan 4 siswa tsb = 36 kg

Urrutan data:
37=3
38=6
39=3
40=4


Modus=38


Median=37+37+37+38+38+38+38+38+38+39+39+39+40+40+40+40

Median=38+38/2=76/2=38


Mean/rata rata=37+37+37+38+38+38+38+38+38+39+39+39+40+40+40+40/16=616/16=38,5