nilai frekuensi
31 – 40 2
41 – 50 5
51 – 60 13
61 – 70 12
71 – 80 9
81 – 90 4
Tentukan nilai rata-rata pada distribusi frekuensi di atas… .
31 – 40 2
41 – 50 5
51 – 60 13
61 – 70 12
71 – 80 9
81 – 90 4
Tentukan nilai rata-rata pada distribusi frekuensi di atas… .
Materi : Data dan Statistika
Banyak Data = 45 data
Jumlah data
2(35,5) + 5(45,5) + 13(55,5) + 12(65,5) + 9(75,5) + 4(85,5)
= 71 + 227,5 + 721,5 + 786 + 679,5 + 342
= 857 + 949 + 1.021,5
= 1.806 + 1.021,5
= 2.827,5
Mean = 2.827,5/45 = 62,8333...
Semoga bisa membantu
[tex] \boxed{ \colorbox{darkblue}{ \sf{ \color{lightblue}{ answered\:by\: BLUEBRAXGEOMETRY}}}} [/tex]
Jawaban:
Penyelesaian :
[tex]\begin{gathered}\boxed{\begin{array}{c|c|c|c}\sf Berat \:(kg)& \sf Frekuensi&x_{i}&f_{i}.x_{i} \\\hline 30 - 41& 2 &35,5&71\\\hline 41 - 50&5&45,5&227,5 \\\hline 51 - 60& 13&55,5&721,5\\\hline 61 - 70 & 12&65,5&786\\\hline 71 - 80 & 9&75,5&679,5\\\hline 81 - 90&4 &85,5&342\\ \hline &f_{i} = 45&&f_{i}.x_{i} = 2.827,5\end{array}}\end{gathered}[/tex]
[tex] \sf Mean = \frac{∑f_{i}.x_{i}}{∑f_{i}} \\ [/tex]
[tex] \sf Mean = \frac{2.827,5}{45} \\ [/tex]
[tex]\sf Mean = 62,83[/tex]
'비상'