Totto an automobile manufacturer has designed aradically new engine and wants to

Totto an automobile manufacturer has designed aradically new engine and wants to recommend the grade of gasolinethat will have the best fuel economy. The four grades are: regularbelow regular premium and super premium. The test car made threetrial runs on the test track using each of the four grades and themiles per gallon were recorded. At the 0.05 level what is thecritical value of F used to test the hypothesis that the miles pergallon for each fuel are the same?