Use chest deceleration data for three different size categories (small, midsize, large). The data are from a standard crash test and they are listed in Data Set 13 in Appendix B. If we use the head injury measurements (in HIC, which is a standard head injury criterion) with the same three size categories, we get the SPSS results shown here. Using a 0.05 significance level, test the claim that the three size categories have the same mean head injury measurement. Does the size of a car appear to affect head injuries?
Use analysis of variance for the indicated test.

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SPSS Sun of Squares df Mean Square 3683.476 18 22863.349 Sig 161 852 Between Groups Within Groups Total 7366.952 411540.286 18907 238 20