Calculate the mean by step deviation method for the following data shows distance covered by $120$ persons to perform their regular work.

19.33 k m

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21.22 k m

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23.54 k m

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19.78 k m

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Solution

The correct option is B $19.33 k m$
Answer:-
Class interval width (i) = 8

Distance (km)
X No. of people
F $u = \frac{X - A}{i}$ Fu
8 20 -1 -20
16 = A 60 0 0
24 10 1 10
32 30 2 60
$Σ f = 120$ $Σ f u = 50$
Mean = $A + \frac{Σ f u}{Σ f} = 16 + \frac{50}{120} \times 8 = 16 + 3.33 = 19.33$
C) 19.33 km

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Distance (km) X	No. of people F	$u = \frac{X - A}{i}$	Fu
8	20	-1	-20
16 = A	60	0	0
24	10	1	10
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	$Σ f = 120$		$Σ f u = 50$

Calculate the mean by step deviation method for the following data shows distance covered by 120 persons to perform their regular work.

The correct option is B 19.33kmAnswer:- Class interval width (i) = 8Distance (km)X No. of peopleFu=X−Ai Fu 8 20-1 -2016 = A 6000 24 1011032 30260 Σf=120 Σfu=50 Mean = A+ΣfuΣf=16+50120×8=16+3.33=19.33C) 19.33 km

Calculate the mean by step deviation method for the following data shows distance covered by $120$ persons to perform their regular work.