alleryThe mean of grouped data by the direct method is:
A$\dfrac{\sum f_i x_i}{\sum f_i}$
B$\sum f_i x_i$
C$\dfrac{\sum x_i}{n}$
D$\dfrac{\sum f_i}{\sum f_i x_i}$
Answer & Solution
Correct answer: A. $\dfrac{\sum f_i x_i}{\sum f_i}$
Direct method mean = Σfᵢxᵢ / Σfᵢ.
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