tentukan Mean,median, modus, Q1danQ3, simpangan kuartil nilai: 70,75,80,85,90,95. frekuensi: 3,4,7,6,5,3 tolong di bantu
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Jawab :
Mean = 82,67 / 82,678
Median = 82,5
Modus = 80
Penjelasan dengan langkah-langkah :
Mean => N = 70, F = 3, N x F = 210
N = 75, F = 4, N x F = 300
N = 80, F = 7, N x F = 560
N = 85, F = 6, N x F = 510
N = 90, F = 5, N x F = 450
N = 95, F = 3, N x F = 285
==
3 + 4 + 7 + 6 + 5 + 3 = 28
210 + 300 + 560 + 510 + 450 + 285 = 2315
==
2315 ÷ 28
Jadi, mean-nya adalah 82,67 / 82,678
==
Median => 70, 70, 70, 75, 75, 75, 75, 80, 80, 80, 80, 80, 80, 80, 85, 85, 85, 85, 85, 85, 90, 90, 90, 90, 90, 95, 95, 95
Median = 80 + 85 ÷ 2 =
165 ÷ 2 = 82,5
Jadi, mediannya adalah 82,5
==
Modus => Nilai yang paling banyak / paling sering muncul
= 80
