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Many drivers of cars that run on regular gas actually buy premium in the belief that they will get better fuel consumption. To test that belief, you tested 8 cars from a company fleet whose cars all run on regular gas. The same cars were filled with premium gasoline and the consumption was recorded. Here are the results (litres per 100 km): Car # 1 2 13 4 5 6 Regular 14.7 1 1.8 11.5 10.7 10.2 8.7 9.0 10.5 Premium 12.4 10.7 9.8 9.8 9.4 9.0 8.5 9.3 Which test procedure would you use to test the claim that cars get significantly better fuel consumption with premium gasoline, what test procedure would you use? OZ-test for the population means O Independent sample t-test OF-test Paired sample t-test OZ-test for the population proportions