For a mortality study of insurance applicants in two countries, you are given: (i) Country A d, Y, Country B t, d, Y, 1 20 200 0.05 15 100 0.10 2 54 180 0.10 20 85 0.10 14 126 0.15 20 65 0.10 4 22 112 0.20 10 45 0.10 Y, is the number at risk over the period (t1,4). Deaths during the period (t-1,4) are assumed to occur at t,. (ii) 0, is the reference hazard rate over the period (t1,t,). Within a country, 0, is the same for all study participants. (iii) (iv) s'(t) is the Product-Limit estimate of S(t) based on the data for all study participants. s*(t) is the Product-Limit estimate of S(t) based on the data for study participants in Country B. (v) Determine s"(4) – s"(4) . (A) 0.06 (B) 0.07 (C) 0.08 (D) 0.09
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