Did the class of the passenger play a role in their survival during the sinking of the Titanic? The data down represent the survival status of passengers by class of service.

	Class
	First	Second	Third
Survived	223	108	128
Did Not Survive	152	177	328

a) Is the class of the passenger independent of survival status? Use a 10% significance level.

b) Identify the type of error that may have been committed.