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6 4
7 6
8 13
9 8
10 9
a. me = jumlah nilai data/ banyak data
=
b.banyak anak ada 40, median terletak antara nilai data ke20 da 21
median =( X₂₀+X₂₁)/2
= (8+8)/2
= 16 / 2 =8
c. modus = nilai data yang sering muncul
= 8
maaf kalau salah :)