Question 1 (30 points)

Develop and interpret a life table, given data.

One thousand two hundred and five (1,205) persons, who were accidentally exposed to a large-dose gamma-radiation leak on December 1, 2019, were followed for a year and their mortality experience was recorded monthly (as at month-end). Some were lost to follow-up during this time period and the whereabouts and outcome of these persons is unknown. The table below lists the monthly-recorded deaths and "withdrawals".

Month (measured at the end of month)	Deaths	Withdrawals (Lost to Follow-up)
December, 2019	10	5
January, 2020	15	7
February, 2020	23	11
March, 2020	27	22
April, 2020	35	4
May, 2020	42	6
June, 2020	21	18
July, 2020	24	3
August, 2020	22	6
September, 2020	10	3
October, 2020	7	15
November, 2020	2	7

Please tabulate the data in an appropriate format (a life table) and answer the following questions based on your calculations:

1. Create a life table (see table 6.9 on page 133 of Gordis for a good example)(10 points)
2. What was the probability of dying during the month of August, 2020?(4 points)
3. What was the probability of surviving until the end of October, 2020?(4 points)
4. Which month exhibited the highest levels of survival (probability of surviving the month)?(4 points)
5. Please draw a survival curve for these data (using the cumulative survival for each month).(4 points)
6. The management of the military installation where this leak occurred think that it is too expensive to keep following these people; the risk of death has become predictable, if not downright low. Do you agree?If so, why? If not, how might you convince them to keep funding the study?(4 points)