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.

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