Question

The following is a list of 4 measurements.13, 7, 7, 20Send data to calculatorSuppose that these 4 measurements are respectively labeled X1, X2,*4. Compute the following.Σ (κ.)i = 1

Answer 1

Given:

The list of 4 measurements is,

13, 7, 7, 20

$x_1=13,x_2=7,x_3=7,x_4=20$

Now,

$\begin{gathered} \sum ^4_{i=1}(x_i)^2=x^2_1+x^2_2+x^2_3+x^2_4 \\ =13^2+7^2+7^2+20^2 \\ =169+49+49+400 \\ =667 \end{gathered}$

Answer: 667