Question

A​ case-control (or​ retrospective) study was conducted to investigate a relationship between the colors of helmets worn by motorcycle drivers and whether they are injured or killed in a crash. Results are given in the accompanying table. Using a 0.05 significance​ level, test the claim that injuries are independent of helmet color.

		Color of Helmet
		Black	White	Yellow	Red	Blue
Controls​ (not injured)		472	334	33	157	96
Cases​ (injured or​killed)		194	109	99	66	47

Compute Test Statistic=

P value=

Critical Value =

Answer 1