Question

For some data x₁, x₂, ..... x_n with respective frequencies f₁, f₂, .... f_n, the value of `sum_1^nf_i(x_i - barx)` is equal to ______.

Options

• `nbarx`

• 1

• `sumf_i`

• 0

Answer 1

For some data x₁, x₂, ..... x_n with respective frequencies f₁, f₂, .... f_n, the value of `sum_1^nf_i(x_i - barx)` is equal to 0.