Interpret the survival curve. What is the probability of survival for each group at 25 months? Percent Surviving 0.9 0.8 0.7- 0.6 0.5 0.4- 0.3- 0.2 0.1 0 10 15 20 Months Chemo Before Surgery Chemo After Surgery a. Surgery after: 90%; Before surgery: 30% b. Surgery after: 30%; Before surgery: 90% c. Surgery after: 50%; Before surgery: 50% d. Surgery after 40%; Before surgery: 100%

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Q: 1 2 3 = 11 = Ho: P₁ P2 P3 P4 =

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A: PeriodOutput16.524.639.8413.656.965710.4814.1

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