In a randomized trial, 174 women with breast cancer were
assigned to receive chemotherapy. Another 164 women were assigned
to receive chemotherapy combined with radiation therapy. Survival
data after 15 years is given below:
a) (1 pt) What is the appropriate test for testing the hypothesis that the treatment type does not affect survival rate?
b) (6pts) Perform the test for the hypothesis that the type of treatment does not affect survival rate. Use α=0.05. Clearly state the null and alternative hypothesis, and your conclusion. (Hint: complete the 2 x 2 table with expected counts and group totals, first)
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Homework Answers
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