5. In low-speed crash tests of five SMART cars, the repair costs were computed for a factory-authorized repair center and an independent repair facility. The results are listed in the accompanying table.

a. Is there sufficient evidence to support the claim that the independent center has lower repair costs? Use a 0.05 significance level. 

Authorized repair center $797 $571 $904 $1,147 $418

Independent repair center $523 $488 $875 $911 $297