Suppose the data shown here are the results of a survey toinvestigate gas prices. Ten service stations were randomly selectedin each city and the figures represent the prices of a litre ofunleaded regular gas. What can we tell about the relative price ofgas in the two cities?
City 1:
| 1.029 |
| 1.02 |
| 1.017 |
| 1.002 |
| 0.996 |
| 1.017 |
| 1.014 |
| 1.014 |
| 1.014 |
| 0.983 |
City 2:
| 0.999 |
| 1.026 |
| 1.017 |
| 1.008 |
| 0.99 |
| 1.038 |
| 1.017 |
| 1.032 |
| 1.011 |
| 1.014 |
Design a test to determine if there is a difference in mean gasprices in the two cities use alpha = .01
