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Consider the data shown in Table E11.7 (analysis date, 01/90; A, alive; D, dead). For each subject, determine the time (in months) to death (D) or to the ending date (for survivors whose status was marked as A); then calculate and graph the Kaplan-Meier curve.

TABLE E11.7
Subject	Starting	Ending	Status (A/D)
1	01/80	01/90	A
2	06/80	07/88	D
3	11/80	10/84	D
4	08/81	02/88	D
5	04/82	01/90	A
6	06/83	11/85	D
7	10/85	01/90	A
8	02/86	06/88	D
9	04/86	12/88	D
10	11/86	07/89	D

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