Ubah data menjadi float dan hitung mean aritmatika.
statistics.fmean(data, weights=None)
>>> fmean([3.5, 4.0, 5.25])
4.25
>>> grades = [85, 92, 83, 91]
>>> weights = [0.20, 0.20, 0.30, 0.30]
>>> fmean(grades, weights)
87.6