Mathematics

Natasha Warren

18 January, 08:39

1. Investigate if there is an association between survival past 500 days and treatment group. (a) Create a variable that indicates whether each observation survived > = 500 days. (b) What are the two tests that could be used to answer this question? What are the null andalternative hypotheses for each test? When is each test appropriate? (c) Perform the chi-squared test to investigate if there is an association between survival past 500 daysand treatment group. Does one treatment group have a better outcome than the other? Write abrief paragraph to summarize your results. Your summary does not need to include a confidenceinterval, but it should include basic descriptive statistics. (d) Explain why the analysis performed is not sufficient to make definitive conclusions regarding theefficacy of the two treatment groups.