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For some data $x_1, x_2, \dots, x_n$ with respective frequencies $f_1, f_2, \dots, f_n$, the value of $\sum_{i=1}^{n} f_i (x_i - \bar{x})$ is equal to :
- (a)$n\bar{x}$
- (b)$1$
- (c)$\sum f_i$
- (d)$0$
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Sol. (d) $0$
For some data x_1, x_2, , x_n with respective frequencies f_1, f_2, , f_n , the value of Σ_i=1n f_i (x_i - x) is equal…
CBSE Class 10 Maths PYQ · Statistics · Find Mean, median, mode · 1 Mark · March 2024 · Standard
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