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Maths TNSB Mentoring
Class 9
Statistics
Mean of grouped data
5.
Calculate the mean using step deviation method
Question:
5
m.
Find the
mean
of the number of children of various age groups playing in the park using
step deviation metho
d
.
Age
\(2 - 4\)
\(4 - 6\)
\(6 - 8\)
\(8 - 10\)
\(10 - 12\)
Number of children
8
6
7
2
2
The
mean
of the data is
4.72
3.72
7.72
5.72
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