According to fueleconomy.gov, the 2018 Toyota Prius Eco 1.8 L, 4-cylinder, automatic with regular gasoline gets 53 highway miles per gallon (Source). However, an independent organization believes that the gas mileage of the Prius is significantly greater than this. In order to test this they collect a random sample of 9 2018 Priuses with these same specifications and measure the highway gas mileages of each. The results of the 9 cars tested are as follows: 52, 54, 59, 59, 53, 56, 57, 55, and 52. If you perform this test at the alpha=0.05 level, state the p-value and the conclusion of the test.

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According to fueleconomy.gov, the 2018 Toyota Prius Eco 1.8 L, 4-cylinder, automatic with regular gasoline gets 53 highway miles per gallon (Source). However, an independent organization believes that the gas mileage of the Prius is significantly greater than this. In order to test this they collect a random sample of 9 2018 Priuses with these same specifications and measure the highway gas mileages of each. The results of the 9 cars tested are as follows: 52, 54, 59, 59, 53, 56, 57, 55, and 52.

If you perform this test at the alpha=0.05 level, state the p-value and the conclusion of the test.
 
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