Choose the correct answer from the given four options : In the fo… - Vidyadip

MCQ

Choose the correct answer from the given four options : In the formula $\bar{\text{x}}=\text{a}+\frac{\sum\text{f}_\text{i}\text{d}_\text{i}}{\sum\text{f}_\text{i}},$ for finding the mean of grouped data $\mathrm{d}_{\mathrm{i}}$ 's are deviations from a of :

A
Lower limits of the classes.
B
Upper limits of the classes.
✓
Mid points of the classes.
D
Frequencies of the class marks.

✓

Answer

Correct option: C.

Mid points of the classes.

We know that, $d_i=x_i-a$
i.e., $\mathrm{d}_{\mathrm{i}}$ 's are the deviation from a of mid $-$ points of the classes.

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