Question 8 (1 point)

Year	Advertising	Quality_Control	Sales_Revenue
1	8	3	97.5
2	7	4	107.0
3	7	5	105.5
4	9	4	111.6
5	9	5	119.8
6	10	5	134.7
7	11	3	117.1
8	12	3	127.5
9	13	4	139.5
10	11	4	112.0
11	10	5	141.4
12	12	6	133.2
13	14	6	162.4
14	15	5	152.4
15	15	4	125.0

This is same regression data as the previous question. Just use regression output from that question to answer this question as well. Your output will show that observations = 15 and R² = about 0.56. Which range of Sales_Revenue values below is the 95% confidence range (approximate) for the Sales_Revenue forecast when Advertising = 12?

Question 8 options:

a)	115 to 163

b)

97 to 143

c)	122 to 138

d)	106 to 157