Question

the following is a list of 6 measurements. 9, 18, 20, 14, 8, 5 suppose that these 6 measurements are respectively labeled $x_1,x_2,ldots,x_6$. compute the following. $sum_{i = 1}^{6}x_i$

Explanation:

Step1: Recall the meaning of sum notation

The symbol $\sum_{i = 1}^{6}x_{i}$ means to sum up the values of $x_1,x_2,\cdots,x_6$. Here $x_1 = 9,x_2=18,x_3 = 20,x_4=14,x_5 = 8,x_6=5$.

Step2: Calculate the sum

$9 + 18+20 + 14+8+5=(9 + 18)+20+(14 + 8)+5=27+20 + 22+5=(27+20)+(22 + 5)=47+27 = 74$.

Answer:

74