4. The number of people who survived the Titanic based on class and sex is in table #11.1.5("Encyclopedia Titanica," 2013).Is there enough evidence to show that the class and the sex of a person who survived the Titanic are independent?Test at the 5% level.

Sex Class Female Male Total 1st 134 59 193 2nd 94 25 119 3rd 80 58 138 Total 308 142 450