A hypothetical cohort study was conducted to look at survival after being diagnosed with breast cancer. Ten participants were followed for 2 years, resulting in the following table:
Follow-up Time (Months)
Event
2
Censored
6
Death
8
Death
14
Censored
15
Death
19
Death
21
Censored
24
Followed until end of study period
24
Followed until end of study period
24
Followed until end of study period
1) What is the cumulative survival probability at the end of the follow-up period?



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