Solution:
Mean=μ=ΣfixiΣfi=15×0+24×1+8×2+6×3+10×4+4×567Mean=\mu=\dfrac{\Sigma f_ix_i}{\Sigma f_i} \\=\dfrac{15\times 0+24\times 1+8\times 2+6\times 3+10\times 4+4\times 5}{67}Mean=μ=ΣfiΣfixi=6715×0+24×1+8×2+6×3+10×4+4×5
=0+24+16+18+40+2067=11867=1.76=\dfrac{0+24+16+18+40+20}{67} \\=\dfrac{118}{67}=1.76=670+24+16+18+40+20=67118=1.76
Now, mean deviation
=Σ∣xi−μ∣Σfi=1.76+0.76+0.24+1.24+2.24+3.2467=0.14149=\dfrac{\Sigma|x_i -\mu|}{\Sigma f_i} \\=\dfrac{1.76+0.76+0.24+1.24+2.24+3.24}{67} \\=0.14149=ΣfiΣ∣xi−μ∣=671.76+0.76+0.24+1.24+2.24+3.24=0.14149
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