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Verified answer
Verified answer
Diketahui :Median = 56,5
Ditanya : nilai k ?
Dijawab :
Karena median = 56,5 berarti terletak pada interval berat badan 50 - 59 (fm = 10)
n = 32 + k
Li = Batas bawah - 0,5
Li = 50 - 0,5
Li = 49,5
p = 40 - 30
p = 10
fk = frekuensi sblm kelas median
fk = 5 + 7
fk = 12
Median = Li + [(1/2n - fk) / fm] x p
56,5 = 49,5 + [{(1/2 (32 + k) - 12} / 10]x 10
56,5 - 49,5 = [1/2 (32 + k) - 12]
7 = [1/2 (32 + k) - 12]
7 + 12 = [1/2 (32 + k)]
19 = [1/2 (32 + k)]
38 = 32 + k
k = 38 - 32
k = 6
Jadi, nilai k adalah 6