The following observations are lifetimes (days) subsequent to diagnosis for individuals suffering from blood cancer. 116 182 256 418 442 461 516 739 743 789 808 866 924 984 1025 1062 1064 1166 1191 1222 1222 1252 1277 1291 1357 1369 1409 1455 1479 1519 1578 1578 1599 1604 1605 1697 1736 1799 1815 1852 1899 1925 1966
A) can a confidence interval for true average lifetime be calculated without assuming anything about the nature of the lifetime distribution? Explain.
B) Calculate and interpret a confidence interval with a 99% confidence level for true average lifetime.