9. (15pts) Below is a data table from a survey of 12 random car owners that were asked about their typical monthly expenses in dollars on gasoline. 210 160 43 255 176 135 221 259 380 405 391 477

A consumer report claims drivers spend $180 on average for monthly gasoline expenses. Can this claim be rejected at a 5% level of significance? Use a confidence interval to complete this test.