please help

1.) Some people believe that higher-octane fuels result in better gas mileage for their car. To test this claim, a researcher randomly selected 11 individuals (and their cars) to participate in a study. Each participant received 10 gallons of gas and drove their car on a closed course that simulated both city and highway driving. The number of miles driven until the car ran out of gas was recorded. A coin flip was used to determine whether the car was filled with 87-octane or 92-octane fuel first, and the driver did not know which type of fuel was in his or her tank. Test the claim that the mileage from 87 octanes is worse than the mileage from 92 octane using at a significance level of 0.10. The data is attached called "octane". O Octane data Home Insert Draw Page Layout Formulas Data Review X A. % Conditional Formatting Format as Table Paste Font Alignment Number Cell Styles . K18 X V fx A B C D E G H 1 Car 87 Octane 92 Octane AW NH 234 237 257 238 243 229 215 224 114 119 287 297 315 351 229 241 10 192 186 10 204 209 11 547 562