For some data x_1, x_2, \ldots, x_n with respective frequencies f_1, f_2, \ldots, f_n, the value of \sum f_i(x_i - ... | MCQ 1m | Maths | SuperPadhai

Statistics > Question

MCQ1 markYear: 2024MediumCBSE Class 10

statisticsmeandeviation

Question

For some data

x_{1}, x_{2}, \dots, x_{n}

with respective frequencies

f_{1}, f_{2}, \dots, f_{n}

, the value of

\sum f_{i} (x_{i} - \overset{x}{ˉ})

is equal to:

Solution

1

\sum f_{i} (x_{i} - \overset{x}{ˉ}) = \sum f_{i} x_{i} - \overset{x}{ˉ} \sum f_{i} = \sum f_{i} x_{i} - \frac{\sum f _{i} x _{i}}{\sum f _{i}} \cdot \sum f_{i} = 0

+1 mark

Practice this question interactively with step-by-step AI feedback

Sign up for SuperPadhai