You work for an insurance company and are studying the relationship between types of crashes and the vehicles involved. As part of your​ study, you randomly select 3550 vehicle crashes and organize the resulting data as shown in the contigency table. At a = 0.01                                                                   Type of crash    Car    Pickup    Sport utility  Single-vehicle    807    397         344  Multiple-vehicle  1137  465    400 Calculate the degrees of freedom. d.f =  Find the critical value. What is the correct rejection​ region?   Calculate the test statistic x2 =

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