Suppose the National Transportation Safety Board (NTSB) 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 α = 5%.  Compact Midsize Full-size 643 655 702 680 672 469 427 525 495 483 484 465 402 476 435   State the null and alternate hypothesis for the data.  Given the results, what will be the conclusion of the team?

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