Based on the analysis of used car prices you did for Exercise 25, if appropriate, create a 95% confidence interval for the slope of the regression line and explain what your interval means in context.
Age (yr) .... Prices Advertised ($)
1 ........ 13990
1 ........ 13495
3 ........ 12999
4 ........ 9500
4 ........ 10495
5 ........ 8995
5 ........ 9495
6 ........ 6999
7 ........ 6950
7 ........ 7850
8 ........ 6999
8 ........ 5995
10 ........ 4950
10 ........ 4495
13 ........ 2850