Question

# Find out mean deviation and its coefficient of the following data: Items 5 10 15 20 25 30 35 40 Frequency 8 16 18 22 14 9 6 7

Solution

## Items (X) Frequency (f) fX Deviation from Mean $\left|\mathbit{X}\mathbf{-}\overline{)\mathbf{X}}\right|$= $\left|{\mathbit{d}}_{\overline{)\mathbf{X}}}\right|$ $\mathbit{f}\left|{\mathbit{d}}_{\overline{)\mathbf{X}}}\right|$ 5 10 15 20 25 30 35 40 8 16 18 22 14 9 6 7 40 160 270 440 350 270 210 280 15.2 10.2 5.2 0.2 4.8 9.8 14.8 19.8 121.6 163.2 93.6 4.4 67.2 88.2 88.8 138.6   Σf = 100 Σfx = 2020   $\mathrm{\Sigma }f\left|d\overline{)\mathrm{X}}\right|=765.6$ (a) (b) Mean deviation from Arithmetic Mean $M{D}_{\overline{)X}}=\frac{\mathrm{\Sigma }f\left|{d}_{\overline{)X}}\right|}{\mathrm{\Sigma }f}=\frac{765.6}{100}=7.656$ (c) Coefficient of $M{D}_{\overline{\mathit{X}}}$ EconomicsTR Jain (2018)Standard XI

Suggest Corrections

0

Similar questions
View More

Same exercise questions
View More

People also searched for
View More