The regional transit authority for a major metropolitan area wants to determine whether there is any relationship between the age of a bus and the annual maintenance cost. A sample of buses resulted in the following data. AgeCost
1350
2370
2480
2520
2590
3550
4750
4800
5790
5950
a. Develop the least squares estimated regression equation (to 4 decimals, if necessary).

y= +AGE

b. Test to see whether the two variables are significantly related with a=.05

-Reject null hypothesis or Do not reject null hypothesis

c. Did the least squares line provide a good fit to the observed data?

Yes or No

d. Develop a 95% prediction interval for the maintenance cost for a specific bus that is 4 years old (to 1 decimal).

to