## Eight randomly selected customers at a local grocery store spent the following amounts on groceries in a single visit: $216,$184, $35,$92,

Question

Eight randomly selected customers at a local grocery store spent the following amounts on groceries in a single visit: $216,$184, $35,$92, $142,$175, $9, and$57. Let yi denote the amount spent on groceries by a single customer in a single visit. Find the following (give the answers without commas):

a. ∑y
b. (∑y)^2
c. ∑y^2

in progress 0
6 months 2021-08-27T15:50:10+00:00 1 Answers 0 views 0

a) 910

b) 828100

c) 144320

Step-by-step explanation:

a. ∑y

This is the sum of all values of y. So

b. (∑y)^2

This is the square of the sum, so the square of 910, that we found in the previous item.

910² = 828100

c. ∑y^2

This is the sum of the squares of each amount spent. So