Page 228 - DSOC404_METHODOLOGY_OF_SOCIAL_RESEARCH_ENGLISH

Methodology of Social Research

notes (iii) considering mode as basis—In order to find the mean deviation in the given question from the
mode, we need to first find the mode, which is found out as below:
Arranging the wages in a particular order:
120,125, 135, 135, 135, 142, 146, 148, 150, 155, 160
from the above order, it is clear that 135 is used the maximum number of times and its frequency is 3.
therefore,
\ Mo = ` 135
Keeping this mode in mind, now we have to formulate the following table in order to compute the
mean deviation.

Wages (in `) (x) Mode (Mo) (x – Mo) = “(d)”*
120 135 120 – 135 = 15
125 135 125 – 135 = 10

135 135 135 – 135 = 0
135 135 135 – 135 = 0
135 135 135 – 135 = 0
142 135 142 – 135 = 7
146 135 146 – 135 = 11

148 135 148 – 135 = 13
150 135 150 – 135 = 15
155 135 155 – 135 = 20
160 135 160 – 135 = 25

n = 11 Sd = 116

Notes there is no need to consider the + sign or – sign in this computation.

Now using the method to calculate mean deviation, we will compute it as shown below:
S d
d =
n
Here, Sd = 116
n = 11 (No. of labourers)
116
d =
11
= 10.54
therefore, mean deviation (d) = rs 10.54.

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