1.The Titanic data set provides the information of four key categorical attributes for each of the 2201 people on board the Titanic when it struck an iceberg and sank. The two categorical variables of interest are Class (Class; First class, Second class, Third class, or Crew Member), and if they survived the sink (Survived; yes or no). The ²-statistic was found to be 190.4. Can we conclude that different social classes have different survival rates? Make sure you use the three-step process and an appropriate decision point to answer this question. [2+1+2 marks]