Black	White	Yellow	Red	Blue
Controls (not injured)	488	348	25	151	76
Cases (injured or killed)	201	108	7	63	38

A case-control (or retrospective) study was conducted to investigate a relationship between the colors of helmets worn by motorcycle drives and whether they are injured or killed in a crash. Results are given in the table. Using a .05 significance level, test the claim that injures are independent of helmet color. Compute the test statistic _____ Find the critical value(s) _____ What is the conclusion based on the hypothesis test?