Question

Pertanyaan terlampir​

Answer 1

Verified answer

Jawaban:

Penyelesaian :

[tex]\begin{gathered}\boxed{\begin{array}{c|c|c|c}\sf Nilai & \sf Frekuensi&x_{i}&f_{i}.x_{i} \\\hline 40 - 49 & 4 &44,5&178\\\hline 50 - 59&6&54,5&327 \\\hline 60 - 69& 10&64,5&645 \\\hline 70 - 79 & 4&74,5&289\\\hline 80 - 89 & 4&84,5&338\\\hline 90 - 99&2 &94,5&189\\ \hline &f_{i} = 30&&f_{i}.x_{i} = 1.975\end{array}}\end{gathered}[/tex]

[tex] \sf Mean = \frac{f_{i} \: . \: x_{i}}{f_{i}} [/tex]

[tex] \sf Mean = \frac{1.975}{30} [/tex]

[tex] \sf Mean = 65,83[/tex]

'비상'