In the following 2 by 2 contingency table of Survival at 5 y…
In the following 2 by 2 contingency table of Survival at 5 years (yes or no) by Age at Diagnosis (=age 50), the data cell counts are presented as follows: under survival “yes” and age =50 cell count= 55, under survival “no” age =50 cell count=75. What is the expected value for the cell under survival “yes” and age >=50 cell where the cell count= 55?