In 1912 the British luxury passenger ship Titanic struck an iceberg and sank on its way to New York City. Think of the Titanic disaster as
an experiment in how the people of that time behaved when faced with death in a situation where only some can escape, and consider the
passengers from the data file Titanic.jmp as a sample from the population of their peers. We want to determine if economic status and
survival are independent.
Survival Status
Economic Status
Died
Survived
Highest
117
187
Middle
526
186
Lowest
163
112
a) State the null and alternative hypotheses.
b) Produce a contingency table output in JMP. In this table, have JMP display the âCount,†“Expected,†and “Cell Chi Squareâ€
values.
Give the p-value and the decision from the test at the 5% significance level.
d) What do you conclude from this significance test at the 5% level? State your conclusion in the context of the problem.