Question

So I need help, it confuses me a lot.
There's the chart and the answers.

Answer 1

$0.20

Explanation:

When finding the mean, you add up all the numbers, then divide by how many numbers there are. So you add up all the costs and divide them by 7.

Week 1: 3.3

Week 2: 3.1

Then ofcouse, to find the difference you subtract 3.3 by 3.1 and you get $0.20

Answer 2

The answer is $0.05.

Explanation:

Find the mean, then subtract both the means.

0.54142857142-0.49428571428=x

x=0.047143

If estimated it is 0.05.