Page 42 - modul statistik dasar_Neat

SOAL-SOAL LATIHAN

1. Write out the terms in each of the following indicated sums:
2
4
6
5
4

a)  X b).  (X j  ) a c).  f k .X d).  Y j  3
k
j
j 1 j  1 k 1 j  1

2. The grades of a student on six examinations were 84, 91, 72, 68, 87, and 78. Find the
arithmetic mean of the grades!
3. Find the arithmetic mean of the numbers 5, 3, 6, 5, 4, 5, 2, 8, 6, 5, 4, 8, 3, 4, 5, 4, 8, 2,
5, 4 !
4. Out of 100 numbers, 20 were 4’s, 40 were 5’s, 30 were 6’s and the remainder were 7’s.
Find the arithmetic mean of the numbers!
5. Tabel 2.1 Tinggi 100 siswa SMA XYZ
Tinggi badan (in) frekuensi
60 - 62 5
63–65 18
66–68 42
69–71 27
72–74 8
100
Hitunglah : Mean, Median, Modus !

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