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Stastics — Maths STD 10 — Question

CBSE BoardEnglish MediumSTD 10MathsStastics1 Mark
MCQ
In the formula $\bar{\text{x}}=\text{a}+\frac{\sum\text{f}_\text{i}\text{d}_\text{i}}{\sum\text{f}_\text{i}},\text{d}_\text{i}$ represents :
  • A
    $\text{a}+\text{x}_\text{i}$
  • ✓
    $\text{d}_\text{i}=\text{x}_\text{i}-\text{a}$
  • C
    $\text{a}-\text{x}_\text{i}$
  • D
    $\text{x}_1+\text{a}$
✓

Answer

Correct option: B.
$\text{d}_\text{i}=\text{x}_\text{i}-\text{a}$
represents $\text{x}_\text{i}-\text{a}.\text{ d}_\text{i}$ is the deviation from each mid value $''\text{x}''_\text{i}$ by an assumed mean value $''\text{a}''_\text{i}$.

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