The mileage yield per gallon

          The following are the mileage yield per gallon which a test driver consumed for 5 containers each of four kinds of gasoline. Use non-parametric test at the level of significance alpha =.05 to check the claim that the there is no significant difference in the true average mileage yield of the four kinds of gasoline. Gasoline Brand Miles/ Gallon C P S T 24 21 28 29 17 31 23 16 21 32 26 18 31 19 31 31 22 17 14 20