Mean Deviation and Variance of Data (Jee Mains) | ExamDuo
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Dispersion and Variance
Medium
Mean Deviation and Variance of Data
Let the mean of the data
x
1
3
5
7
9
Frequency (f)
4
24
28
a
8
be 5 . If
m
and
σ
2
are respectively the mean deviation about the mean and the variance of the data, then
3
α
m
+
σ
2
is equal to _____.
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