3. Suppose the Road Transport and Safety Agency wants to examine the safety of compact cars, midsize cars, and full-size cars. It collects a sample of three for each of the treatments (cars types). Using the hypothetical data provided below, test whether the mean pressure applied to the driver's head during a crash test is equal for each types of car. Use a = 5% and the F-critical value at (df1 = 2 and df2) = 5.14 Compact Cars Midsize Cars Full-size Cars 643 469 484 655 427 456 702 525 402 a. State the null and alternative hypothesis b. Calculate the appropriate test statistic. c. What decision can you make. then. ad all

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