Question 1. Compilation of results from a clinical trial reveals that 475 of 601 cases survive at least 5 years after diagnosis. Based on this information, estimate the probability of surviving at least 5 years. a. Probability of surviving at least 5 years is estimated to be 0.79 b. Probability of surviving at least 5 years is estimated to be 0.50 c. Probability of surviving at least 5 years is estimated to be 0.21 d. Probability of surviving at least 5 years is estimated to be 1.27

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